School Science Lessons
2017-11-18 SP MF LI
Please send comments to: J.Elfick@uq.edu.au

16a Chemistry of natural products
Table of contents

16.3.1.0 Aliphatic, aliphatic compounds

16.3.4.0 Aromatic, aromatic compounds

16.3.8.0 Carboxylic acids and fatty acids

16.2.10 Coal tar products, creosote

16.3.1.0 Aliphatic, aliphatic compounds
Aldose sugars
16.3.1.0 Aliphatic, aliphatic compounds
16.3.2.3 Alditols, polyhydric alcohols, mannitol
Allantoin, C4H6N4O3, in face creams, in Symphytum officinale, comfrey
16.3.2.2 Carbohydrate acids, D-gluconic acid
16.3.1.1 Carbohydrates
16.3.8.0 Carboxylic acids and fatty acids
16.3.1.6 Cellulose, hemicellulose
Chitin
16.3.6.9 Clove oil, eugenol
CPY3A4
16.3.2.1 Cyclitols, inositol
16.3.1.4.0 Disaccharides
Sucralose
16.3.2.6.1 Glucosides
16.3.2.4 Glycosaminoglycans, glucosamines
16.3.2.6.0 Glycosides
16.3.3.0.5 Glycerides, esterification of glycerol
Glycerol
Glycolic acid, hydroxyacetic acid, HOCH2COOH, α-hydroxy acid
Ketose sugars
16.3.3.0.2 Lecithins
16.3.4.4 Lignans, plant phenols, [C6-C3]2
16.3.3.0 Lipids, fats and oils, fatty acids, glycerides
16.3.1.3 Monosaccharides
16.3.1.3.1 Monosaccharides, D and L sugars
16.3.2.8 Nucleosides, nucleic acids, DNA, RNA
16.3.1.8 Pectin, Aspergillus japonicus
16.3.2.7 Polyketides, polyketide antibiotics
16.3.2.9 Polysaccharide gum, phycocolloids
16.3.7.1 Reducing sugars / non-reducing sugars
RuBisCO, carbon fixing enzyme
16.3.3.0.1 Phospholipids, (phosphoglycerides)
16.3.1.4.3 Polysaccharides
16.3.1.5 Starches, amylum, glycogen
16.3.1.2 Sugars
16.3.4.3 Tannins, plant polyphenols
16.3.1.4.2 Tetrasaccharides
16.3.1.4.1 Trisaccharides
16.3.3.1 Waxes
Wool wax

16.3.4.0 Aromatic, aromatic compounds
16.3.4.0 Aromatic, aromatic compounds
16.3.4.0b Aramids
Aromatic acids
16.3.4.0.9 Aromatic alcohols
16.3.4.0.10 Aromatic aldehydes and ketones
16.3.4.0.4 Aromatic amines, anilides
16.3.4.0.6 Aromatic halogen compounds
16.8.0 Aromatic hydrocarbons
16.3.4.0.2 Aromatic nitro compounds
16.3.4.0.7 Aromatic sulfonic acids
16.3.4.0a Aryl groups
16.8.1 Reactions of benzene, C6H6
16.3.4.0.5a Barbiturates (depressants)
16.3.4.0.5b Benzodiazepines (tranquillizers)
16.3.4.1a Benzofuranoids, benzopyranoids
16.9.20 Bergamottin, C21H22O4
16.3.2.5a Catecholamines
Coumarin, C9H6O2
16.3.4.0.5 Diazo compounds
16.3.4.5 Five member heterocycles
16.3.4.2.0 Flavonoids, (Bioflavonoids), plant polyphenols
Geosmin, C12H22O, earth smell, muddy fish smell, after rain smell, cut grass smells
16.3.4.0.3 Lactams (-NH(CO-), e.g. caprolactam
16.3.4.4 Lignans, plant phenols
16.3.4.0.12 Parabens
16.3.4.0.13 Pyridine
16.2.7.0 Tannins, plant polyphenols

16.3.8.0 Carboxylic acids and fatty acids
16.4.1.1 Carboxylic acids, fatty acids and their salts
16.3.8.6 α-hydroxy acids
16.3.4.0.11 Aromatic carboxylic acids, derivatives
16.3.8.2 Dicarboxylic acids
16.3.8.7 Keto acids
16.3.8.5 Perfluorooctanoic acid
16.3.8.1 Saturated carboxylic acids
16.3.8.3 Tricarboxylic acids
16.3.8.4 Unsaturated fatty acids

16.3.3.1 Waxes
Candles, Happy Flame Candles, (commercial)
8.1.1 Candles, (Chemistry)
8.1.1a Candles, (Physics)
Beeswax
Candelilla wax
Carnauba wax
Cetyl palmitate wax
Heelball wax
Jojoba oil
Meadow foam oil
Wool wax, (lanolin)

16.3.1.4.0 Disaccharides, trisaccharides, tetrasaccharides, polysaccharides
| See diagram 16.3.1.4a: Maltose molecule
| See diagram 16.3.1.4b: Lactose molecule
| See diagram 16.3.1.4c: Sucrose molecule
Disaccharides contain two sugar units:
lactose = (milk sugar, glucose + galactose)
maltose = (malt sugar, glucose + glucose)
sucrose = (glucose + fructose)
Sucralose
Sucralose, C12H19Cl3O8, trichlorogalactosucrose, E 955, Relative sweetness 650
Sucralose in "Splenda".
Each sachet of Splenda contains maltodextrin, dextrose and sucralose.
Sucralose, Soft drinks, carbonated beverages: 15.8.6
16.2.10 Coal tar products, creosote
Creosote, (prohibited substance for schools)
Chemicals produced from destructive distillation of coal when making coke for steel production.
Many organic compounds can be isolated by distillation of coal tar but many are now made from petroleum or natural gas.
The residue of coal tar distillation is called pitch and is used for road tar and waterproofing of roof material.
The residue of petroleum distillation is called asphalt but also called "tar".
Coal tar paints resist heat and moisture.
Coal tar dyes, called azo dyes, are made from azobenzene and were used as food colourings.
Coal tar products include:
1. hydrocarbon oils, e.g. benzene, toluene, xylene
2. phenols, e.g. carbolic acid, and
3. bases.
e.g. pyridine.
Coal tar is a creosol mixture that includes 2-hydroxytoluene, 3-hydroxytoluene, 4-hydroxytoluene.
It sensitizes skin to sunlight, so use gloves because it may cause skin cancer.
It is used as a wood preservative of railway sleepers, telegraph poles., fungicide, soap for treatment of skin diseases, and sheep dip
insecticide.
However, wood creosote is a mixture of phenols of wood tar and is used as a disinfectant, cough medicine, diarrhoea medicine,
preservative, and antiseptic.

16.3.1.4.1 Trisaccharides
Raffinose, (triose: fructose + galactose + glucose), (C18H32O16),
Also, melezitose, maltotriose, (amylotriose)

16.3.1.4.2 Tetrasaccharides
See diagram 16.3.1.4: Stachyose, acarbose
Acarbose, (C25H43NO18), anti-diabetic drug
Stachyose, (tetrose: fructose + galactose + glucose + galactose, i.e. raffinose + galactose), (C24H42O21), in green beans

16.3.1.4.3 Polysaccharides, glycans
Polysaccharides are long carbohydrate molecules consisting of repeated monomer units joined together in a chain by glycosidic bonds
and contain linked monosaccharide units, (C6H10O5)n
1. Homopolysaccharides, homoglycans, contain the same type of monomer unit
2. Glucosans, (from glucose)
Starch, amylopectin glucosan + amylose sugar
Glycogen, glucose residues
Cellulose, D-glucose units
2. Fructans, (from fructose)
Inulin, D-fructose, in artichokes
2. Galactans, (from galactose)
Agar

1. Heteropolysaccharides, heteroglycans, contain different type of monomer r units
Acidic, mucopolysaccharides, glycosaminoglycans long unbranched polysaccharides, repeating disaccharide units
Chitin
Heparin
Chondroitin sulfate
Keratan sulfate
Pectin
Hyaluronic acid
Dextran, Modified polysaccharide

Chitin
See diagram 16.3.1.7a: Chitin
Chitin, (C8H13O5N)n, is an insoluble nitrogenous polysaccharidepolymer of the monosaccharide derivative of glucose,
 N-acetylglucosamine, (C8H15NO6), which contains chains of N-acetylglucosamine in support structure of invertebrates and fungi,
e.g. shells of arthropods. in fungi cell walls, arthropod exoskeletons, e.g. crabs, insect exoskeleton, mollusc radula, cephalopod beak,
e.g. squid.
Chitin is a similar structure to cellulose and keratin.
Used as a binder in dyes, adhesives, fabrics and dissolving surgical thread.
Pectin
Pectin is a polysaccharide that forms the primary cell walls of many terrestrial plants.
Pectin has various uses in the food industry as it acts as a gelling agent for jams and jellies.
It is also used as a food thickening agent and stabilizer in juices, milk.

Arabinoxylans
Arabinoxylans is a polysaccharide found in the primary and secondary cell wall of plants i.e. wood and also in the cereal grains.
It is a combination of arabinose and xylose.

β-glucan, (cellotriose, β-D-glucan, glucan, C18H32O16), D-(+)-cellotriose, glucopyranosyl
Oligosaccharides raffinose, stachyose and verbascose are present in significant quantities in legume seeds

16.3.1.5 Starches, amylum, glycogen
See diagram 16.3.1.5a: Starch, amylose,
(amylum), (amylose, soluble starch, many glucose units), (amylopectin, insoluble starch, 40 to 60 branched glucose units).
(Starch, amylum = amylose + amylopectin)
Glycogen in animals.,
Glycogen, α-1,4- and α-1,6-glucan, unbranched glucose polymer similar to amylopectin
Inulin = D-fructose units, from Helianthus
Boil cut potato in water then let cool.
Filter the solution to separate the soluble amylase from the insoluble amylopectin of the starch grains.
Add tincture of iodine to the filtered starch solution.
An intense blue colour occurs.
The solution contains β-amylase, C6H10O5 that forms a complex with iodine: (β-amylase)p, (I-), (I2)r(H2O)s [where r < p < s].

16.3.1.6 Cellulose, hemicellulose
See diagram 16.3.1.6a: Cellulose, three glucose molecules linked to form cellulose
See diagram 16.3.1.7a: Cellulose
See diagram 16.3.1.7C: Linamarin
See diagram 16.3.1.7d: Cyanohydrin
Cellulose is a long unbranched glucose polymer.
Cellulose in plant cell walls, hemicellulose in some plant endosperm to form vegetable ivory.
Gun-cotton was prepared by saturating cotton or cellulose material in nitric acid and sulfuric acid to produce a highly explosive material.

16.3.1.8 Pectin
Pectin, poly-D-galacturonic acid methyl ester, from apple and citrus peel, is a heterosaccharide component of terrestrial plant cell walls.
It is used as a substrate to identify, differentiate and characterized pectinases.
Pectin is used to study its degradation by pectinolytic bacteria.
Pectin has high molecular weight, cements adjacent plant cells, and is dissolved by pectinase in ripening fruit.
It is sold as a white-brown powder and is used to form gels and as thickening agents.
Galactouronic acid, C6H10O7, is a component of pectin.
Pectinase, polygalacturonase, catalyzes hydrolysis in pectin
Pectinesterase, pectin methylesterase, catalyzes hydrolysis of methyl esters of pectin --> pectate + methanol
Pectolyase from Aspergillus japonicus plant cell culture, catalyzes breakdown of methyl esters --> oligosaccharides

16.3.2.1 Cyclitols
Cyclitols are cycloalkanes containing one hydroxyl group on each of three or more ring atoms, e.g. Inositol, cyclohexane,
cyclohexane-1,2,3,4,5,6-hexol, C6H12O6, prescribed for some medical conditions, but should not be taken as a "vitamin supplement"
to the diet.
Inositol
Inositol is in eggs: 22.15
Commercial: myo-Inositol, 1,2,3,4,5,6-Hexahydroxycyclohexane, meso-Inositol, C6H12O6

16.3.2.4 Glycosaminoglycans, (mucopolysaccharides), glucosamines
16.3.0 Amines and alkaloids
Glycosaminoglycans, (mucopolysaccharides), glucosamines, dermatan sulfate, chondroitin, hyaluronic acid, heparin, keratin sulfate.
Glucosamine is converted to glycosamineglycans.
Glucosamine hydrochloride and glucosamine sulfate may repair cartilage and alleviate osteoarthritis.
Commercial: D-(+)-Glucosamine hydrochloride, C6H13NO5. HCl
Heparin, Chondroitin sulfate, Hyaluronan, Heparan sulfate, Dermatan sulfate, Keratan sulfate
Commercial: Heparin sodium salt from porcine intestinal mucosa, anticoagulant
16.3.2.7 Polyketides, polyketide antibiotics
Molecules having more than two carbonyl groups connected by single carbon atoms.
Occur in some bacteria and fungi, e.g. Aspergillus.
They include polyketide antibiotics, streptomyces metabolites, erythromycin, linear tetracyclines, erythromycin polyenes, nystatin,
polyether antibiotics, β-lactams, aflatoxins.
Commercial: Erythromycin, E-Mycin, Erythrocin, C37H67NO13, white powder

16.3.2.8 Nucleosides, nucleic acids, DNA, RNA
| See diagram 16.3.2.8: Nucleic acid
| See diagram 16.21.10: Purines
| See diagram 16.21.13: Pyrimidines
1. Nucleic acids are macromolecules from the nuclei of cells, composed of nucleotide units, and can be hydrolysed into pyrimidine or
purine bases, adenine, cytosine, guanine, thymine, uracil, D-ribose or 2-deoxy-D-ribose, and phosphoric acid.
2. Nucleic acids do several functions in living cells, e.g., the storage of genetic information and its transfer from one generation to the
next
3. DNA, (deoxyribonucleic acid), the expression of this information in protein synthesis, (mRNA, tRNA), and may act as functional
components of subcellular units such as ribosomes, (rRNA).
4. RNA, (ribonucleic acid), contains D-ribose, whereas DNA contains 2-deoxy-D-ribose as the sugar component.
5. A nucleoside is a compound in which a purine or pyrimidine base is bound via a N-atom to C-1 replacing the hydroxy group of
either 2-deoxy-D-ribose or of D-ribose, but without any phosphate groups.
Nucleosides include adenosine, guanosine, cytidine, and uridine, (which contain ribose), and deoxyadenosine, deoxyguanosine,
deoxycytidine and thymidine, (which contain deoxyribose).
6. A nucleotide is a nucleoside in which the primary hydroxy group of either 2-deoxy-D-ribose or of D-ribose is esterified by
orthophosphoric acid.
7. An oligonucleotide is a long linear sequences of nucleotides.

16.3.2.9 Polysaccharide gums, Gums, Phycocolloids
Food stabilizers and thickeners:
1. Gums: (guar gum from Cyamopsis), (gum tragacanth from Astragalus, locoweed), (locust bean gum from carob, Certonia),
(gum arabic from Acacia senegal), (gum karyaya from Sterculia), (gum ghatti from Anogeissus), (xanthan gum from fermented corn
sugar).
2. Phycocolloids: (alginates, algin, from kelp, Laminaria and Macrocystis), (carrageenan from red algae, Irish moss, Chondrus
crispus
), (agar from red algae, Gelidium and Gracilaria).

16.3.3.0 Lipids, fats and oils, fatty acids, glycerides
Lipids are biological substances that are soluble in nonpolar solvents:
1. saponification lipids, e.g. glycerides, (fats and oils), and phospholipids,
2. non-saponification lipids, e.g. steroids.
Lipids refers to the oils, fats and waxes found in living organisms.
Lipids are insoluble in water but soluble in inorganic solvents, e.g. chloroform.
The simple lipids do not contain fatty acids, e.g. steroids, terpenes.
The complex lipids are esters of long chain fatty acids, e.g. glycerides, glycolipids, phospholipids, waxes.
Fatty acids are aliphatic monocarboxylic acids.
See diagram 16.3.3.1: Esterification of glycerol to form fatty acids, fats
See diagram 16.3.3: Lipids, cephalins, glycerides, (triglycerides), glycolipids, lecithins, (choline), phosphoglycerides, prostaglandins
See diagram 19.2.1: Oleic acid, stearic acid, linoleic acid, (cis and trans)
See diagram 16.3.3.2: Saturated and unsaturated fatty acid, triglyceride
See diagram 16.3.3.3: Tristearin
See diagram 16.3.3.4: Human fat molecule

16.3.3.0.1 Phospholipids, (phosphoglycerides)
Phospholipids form when hydroxyl groups form esters with phosphate groups.
They occur as two groups:
1. Phosphoglycerides, e.g. lecithin in cell membranes and in bile.
Phosphatidyl choline, (formerly lecithin), phosphatide with organic base choline, in biological membranes, e.g. egg yolk, is used as a
natural emulsifier.
Egg yolk phospholipids (EYPL) are used as carriers for lipophilic drugs and are a major ingredient of lipid microspheres.

2. Sphingolipids in plant and animal cell membranes.
It is a fat molecule with a phosphate group, replacing the third fatty acid.
glycerol-3-phosphate + 2-monacyl glycerol --> triacyl glycerol + phospholipids.
Sphingolipids: sphingenine, cerebrosides, sphingomyelin.

16.3.3.0.2 Lecithins
Lecithins, diacylphosphatidylcholine, esters of glycerol and choline with fatty acids and H3PO4, in cell membranes.
The lecithin group, (phosphatidylcholine group) are yellow-brown fatty phospholipids in egg yolks and plasma membranes of plant
and animal cells.
They are used as emulsifiers in commercial foods, and cosmetics.

16.3.3.0.5 Glycerides, esterification of glycerol
Glycerides are common biological substances made from esters of glycerol, (propane-1,2,3-triol), with fatty acids:
1. triglycerides, formed from the esterification of three fatty acid molecules with a glycerol molecule
2. 1,2-diglycerides or 1,3-diglycerides,
3. 1-monoglycerides or 2-monoglycerides.
The fats and oils found in living organisms are mainly triglycerides:
1. Monoglycerols, (monoglycerides), e.g. 1-monoacyl glycerol, 2-monoacyl glycerol,
2. Diglycerols, (diglycerides), e.g. 1,2-diacyl glycerol, 1,3-diacyl glycerol,
3. Triglycerols, (triglycerides), (fats, main storage lipids), e.g. triacyl glycerol.
Glycerides, glycerine esters, are fatty acid esters of glycerol, (HOCH2CH(OH)CH2OH).
Esters can form at one, two or three of the hydroxyl groups to form monoglycerides, diglycerides and triglycerides.

Esterification of glycerol
Plant oils are usually triglyceride molecules, esters, composed of a 3C alcohol, glycerol, + 18C or 16C fatty acids containing 12C to
24C.
The number of carbon atoms is counted from the end of the molecule with the carboxylic acid group, COOH.
The position of the first double bond is counted from the other end, the methyl or ω end.
Whether the fatty acid is an ω-6 fatty acid or an ω-3 fatty acid depends on the position of the first double bond.

16.3.8.1 Saturated carboxylic acids
Arachidic acid, (icosanoic acid), C19H39COOH, CH3(CH2)18COOH, (in peanut oil)
Benzoic acid, C6H5COOH, benzenecarboxylic acid, phenylformic acid, harmful if ingested
Butyric acid, butanoic acid, C3H7COOH, CH3(CH2)2COOH, in rancid butter
Capric acid, decanoic acid, CH3(CH2)8COOH, white crystals (in coconut oil, palm oil, mammal milk)
Caproic acid, (hexanoic acid), CH3(CH2)4COOH, (in goat fat)
Caprylic acid, octanoic acid, CH3(CH2)6COOH, (coconuts, breast milk, in sting of whip scorpions!)
Chloroacetic acid, CH2ClCOOH
Decanedioic acid, C10H18O4, HOOC(CH2)8COOH, sebacic acid, from castor oil, natural white crystals, in candles, plasticizer
Dichloroacetic acid, DCA, CHCl2COOH, (in chlorinated drinking water)
Ethanoic acid, CH3COOH, acetic acid, vinegar
Formic acid, CH2O2, HCOOH, methanoic acid, (in insect stings, ants)
Lauric acid, dodecanoic acid, CH3(CH3)10COOH, (in coconut oil, soaps)
Myrstic acid, tetradecanoic acid, CH3(CH3)12COOH, (in nutmeg)
Oxalic acid, C2H2O4.2H2O, HO2CCOOH, ethanedioic acid, (in rhubarb, Oxalis)
Palmitic acid, CH3(CH2)14CO2H, hexadecanoic acid, (palm oil, coconut oil, most animals / plants)
Propionic acid, propanoic acid, C2H5COOH, stored grains preservative)
Stearic acid, octadecanoic acid, CH3(CH2)16COOH, (in fats, soaps, waxes)
Trichloroacetic acid, C2HCl3O2,CCl3COOH, Highly toxic, (used in chemical reactions)
Trifluoroacetic acid, CF3COOH, Corrosive by all routes, causes severe burns, damages eyes
Trifluoroacetic acid, Solution < 1%, Not hazardous, (used in chemical reactions)
Valeric acid, CH3(CH2)3COOH, pentanoic acid, (valerian herb): 16.3.6.1.7

16.3.8.2 Dicarboxylic Acids
Adipic acid, hexanedioic acid, HOOC(CH2)4COOH
Aldaric acids, HOOC-(CHOH)n-COOH, sugar acids, prepare from aldoses, e.g. D-glucose --> D-glucaric acid, C6H10O8
Fumaric acid, butenedioic acid, HCOOHC:CHCOOH } isomers
Maleic acid, butenedioic acid, HCOOHC:CHCOOH } isomers
Malic acid, 2-hydroxybutanedioic acid, HOOCCH(OH)CH2.COOH
Malonic acid, propanedioic acid, HOOCCH2COOH
Oxalic acid, ethanedioic acid, (COOH)2
Oxaloacetic acid, HO2CCH2COCO2H (in Kreb's cycle)
Succinic acid, butanedioic acid, (CH2)2(COOH)2
Tartaric acid, 2,3-dihydroxybutanedioic acid, (CHOH)2(COOH)2

16.3.8.3 Tricarboxylic acids
16.9.5 Citric acid cycle, Krebs cycle
Citric acid, HOOCCH2C(OH)(COOH)CH2COOH
Tricarboxylic acids, citric acid, Aspergillus niger
Citric acid, C6H8O7, 2-hydroxypropane-1,2,3-tricarboxylic acid (HOOCCH2C(OH)(COOH)CH2COOH) occurs in fruits,
e.g. lemons, and prepared by fermentation using Aspergillus niger, used for drink flavouring.
Most of the citric acid used in the world is prepared from Aspergillus niger.
Citric acid in Kreb's cycle, plant and animal cells)
Isocitric acid, C6H8O7

16.3.8.4 Unsaturated fatty acids, (double bond =)
Acrylic acid, (2-propenoic acid), CH2=CHCOOH
Polyunsaturated fatty acids
α-linoleic acid, CH3(CH2)CH=CH(CH2)CH=CH(CH2)CH=CH(CH2)7COOH
Linoleic acid, CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOH
Linolenic acid CH3CH2CH=CHCH2CH=CHCH2CH=CH(CH2)7COOH
Polyunsaturated fatty acids, (PUFA), may have "cis-methylene-interrupted double bonds", "skipped bonds", where two or more
double bonds of the cis configuration are separated by a methylene group, i.e. CH=CH-CH2-CH=CH.

16.3.8.5 Perfluorooctanoic acid
Perfluorooctanoic acid, (PFOA), C8HF15O2, a surfactant, is used to make non-stick cookware, e.g. PTFE, ("Teflon"), and
stain-resistant footwear and clothing.
It persists in the environment and is toxic to animals and may be a carcinogen.

16.3.8.6 α-hydroxy acids
Naturally occurring carboxylic acid, hydroxyl group on the carbon adjacent to the carboxyl group.
Use in skin care.
See diagram 16.3.8.6: Alpha hydroxy acids
Citric acid, HOOCCH2C(OH)(COOH)CH2COOH, citric fruits
Glyceric acid, C3H6O4, 2,3-Dihydroxypropanoic acid
Glycolic acid, Hydroxyacetic acid, HOCH2COOH, sugar cane, sugar beet
Lactic acid, L-(+)-Lactic acid , 2-Hydroxypropionic acid, Sarcolactic acid, C3H6O3, sour milk
Malic acid, HOOCCH(OH)CH2.COOH, green apple sour taste, grapes
Mandelic acid, C6H5CH(OH)CO2H, bitter almond
Tartaric acid, L-(+)-Tartaric acid, L-Threaric acid, C4H6O6, HO2CCH(OH)CH(OH)CO2H, leavening agent

16.3.8.7 Keto acids
Acetoacetic acid, diacetic acid, C4H6O3, CH3COCH2COOH
Pyruvic acid, C3H4O3, CH3COCOOH, metabolism of proteins and carbohydrates, release of energy
Palmitoleic CH3(CH2)5CH=CH(CH2)7COOH
16.3.3.1 Waxes
Waxes are fatty acid esters of high molecular weight alcohols, i.e. lipids with a long chain alcohol + more than 3 fatty acids.
Solid at room temperature, harder, more brittle and less greasy than fats at the same temperature.
Waxes are found in skin, fur feathers, and outer layers of leaves and fruits as follows:

Fats and oils that are fatty acid esters of the trialcohol glycerol.
Waxes are esters of long chain C16 and above alcohols, (with one hydroxyl group), and long chain C18 and above fatty acids.
Natural waxes are mixtures of esters and some hydrocarbons.

Beeswax
Beeswax, [C30H61(C=O)OC15H31, C25-27H51-55(C=O)OC30-32H61-65] comes from the cells of the honeycomb and contains esters
of C16 and C28 acids with C30 and C32 alcohols + mainly C31 hydrocarbons.
Beeswax is used in furniture polishes.
In food industry, beeswax marketed in two forms:
1. Yellow beeswax, yellow or light brown solid brittle when cold and odour of honey,
2. White beeswax, white to translaucent, faint odour of honey
3. Beeswax is used as a carrier for flavours and clouding agent in water-based drinks, no reported allergenicity.
White and yellow beeswax, food additive, E901, glazing agent, release agent, for craft modelling, ointments, and polishes.
Beeswax from bee honeycomb mixture includes the palmitic acid ester of melissyl alcohol, melissyl palmitate, C15H31COOC30H61.
Sealing wax is usually a mixture of beeswax, shellac and turpentine, which may be coloured red for business or black for mourning.

Candelilla wax
Candelilla wax, food additive glazing agent E902, emollient, yellow-brown, hard, brittle, lustrous solid, opaque to translucent, with
aromatic odour when heated.
Candelilla wax contains mainly odd-numbered saturated straight-chain hydrocarbons, C29-C33, esters, and alcohols C28-C34.
Candelilla wax is used as a carrier for flavours in chewing gum.and clouding agent in water-based drinks, no reported allergenicity.
Candelilla, (Euphorbia antisyphilitica), Euphorbiaceae.

Carnauba wax
Carnauba wax comes from the leaves of the Brazilian wax palm, Coperniciaprunifera, (C. cerifera), Arecaceae.
It contains esters of the C32 and C34 alcohols and C24 and C28 fatty acids.
This wax is harder and more impervious than beeswax.
Carnauba wax, glazing agent, E903, used to wax fruit, in cosmetics.

Cetyl palmitate
Cetyl palmitate, [(CH3(CH2)13CH2(C=O)O(CH2)15CH3)] [C15H31COO-C16H33] is a component of spermaceti wax in sperm
whale oil.

Heelball
Heelball is a polishing mixture of hard wax and black colouring used by shoemakers and for brass rubbings of monumental brasses
using heelball over paper.

Jojoba oil
Jojoba oil, Simmondsia chinensis, Simmondsiaceae, mainly wax esters, in cosmetics, seed is toxic and indigestible.

Meadow foam oil
Meadow foam oil, (Limnanthes alba), Family Geometridea

Wool wax
Wool wax, wool grease, degras, from the scouring of wool contains fatty acid esters of cholesterol, lanosterol and fatty alcohols.
It forms as semi-solid emulsion in water that is purified to make lanolin.
Lanolin is wool fat, palmitate and stearate esters of cholesterol, (from sheep sebaceous glands, used in cosmetics)

16.3.4.0 Aromatic, aromatic compounds
The term "aromatic" may mean a fragrant, pungent, spicy, sweet smelling odour, usually compounds having a benzene ring, or it may
refer to ring-shaped flat molecules with a ring of resonance bonds (changing forwards and backwards) as in the benzene molecule.
Originally the term "aromatic" referred to compounds containing the Phenyl radical.
Aromatics, aromatic compounds, benzene derivatives, ring systems, arenes: benzene, toluene, naphthalene
See diagram 16.3.4.0: Acridine, anthracene, anthroquinone, cinnoline, naphthalene, naphthol, quinoline
See diagram 16.8.0: Acetylsalicyclic acid, (aspirin), benzene, benzoic acid, naphthalene
See diagram 16.3.4.1: Single substitution, more than single substitution
See diagram 16.3.4.4: Heterocyclic compounds: pyridine, (2-aminopyridine, 3-bromopyridine, 3-nitropyridine, nicotinic acid ),
(azines: piperidine, pyridinium chloride), pyrylium ion, (quinoline, isoquinoline, 5-nitroquinoline), (pyrimidines: cytisine, thymine, uracil),
(diazines: pyrazine, pyridazine, pyrimidine)
Aromatics have planar ring-type groups usually composed of carbon atoms, at least one benzene ring in the molecule, e.g. benzene,
naphthalene, with alternating double and single bonds.
Extensive localization occurs because some electrons in the molecule are free to move from one atom to another.
The term "aromatic" was used to describe the smell of some compounds later were found to contain benzene or fused benzene rings in
the structure.
It includes arenes and their substitution products, e.g. benzene, naphthalene, toluene, and aromatic heterocyclic structures, e.g. thiophene.

16.3.4.0a Aryl groups
Groups derived from usually an aromatic hydrocarbon by removal of a hydrogen atom.
e.g. benzene, C6H6, less 1 hydrogen atom, H --> phenyl group, C6H5.

16.3.4.0b Aramids
Aramids are aromatic polyamides, e.g. "Kevlar", "Nomex".
Aramid fibres are made by spinning liquid crystal aramid polymers to long chain polymer molecules with remarkable strength.
The polymer chains are linked laterally by hydrogen bonds, used in rope and textile high performance fibres.
"Kevlar", a synthetic fibre with of high-tensile strength, is used as a reinforcing material for the rubber in motor vehicle tyres.

16.3.4.0.1 Aromatic hydrocarbons, arenes
See diagram 16.8.1: Benzene compounds, anthracene
Aromatic hydrocarbons, e.g. Benzene, (C6H6), also in some countries: petrol, pentane-hexane mixture, petroleum spirit.
Benzene is the simplest aromatic compound. As it is toxic and carcinogenic, it should not be used in schools.
Aromatic hydrocarbons, arenes, alkylbenzenes, e.g. benzene C6H6, toluene C6H5CH3, [xylene (dimethylbenzene) (CH3)2C6H4],
[styrene, (phenylethene), (C6H5CH=CH2)], naphthalene C10H8, anthracenen C14H10, cyclohexane C6H12.
Anthracene, C14H10, paranaphthalene, anthracin, anthracene oil, Irritant, harmful if ingested, Very Hazardous, Toxic

16.3.4.0.2 Aromatic nitro compounds
Aromatic nitro compounds, e.g. Nitrobenzene, oil of mirhan, (C6H5NO2)

16.3.4.0.3 Lactams
Lactams, (-NH(CO-), e.g. caprolactam, (6-hexanelactam), (C6H11NO)
See diagram 16.3.4.3: Lactams, penicillin G, amoxicillin
Lactams in part of a ring, cyclic amides, amino group + carboxylic acid group --> amide linkage, e.g. caprolactam, (6-hexanelactam),
(C6H11NO), to make nylon, 4-aminobutanoic acid lactam, (β lactam 4C ring, γ-lactam 5C ring, δ-lactam 6C ring), e.g. the pyrimidine
base uracil, β-lactam antibiotics, e.g. penicillin, also: caprolactam, (C6H11NO), also: lactones, (cyclic esters), e.g. 4-hydroxybutanoic
acid lactone CH2CH2CH2OC=O, γ-butyrolactone, GBL, C4H6O2.

16.3.4.0.4 Aromatic amines
Aromatic amines, anilides, e.g. phenylamine, (aniline, amino benzene), (C6H5NH2), (phenylammonium ion, anilinium ion C6H5NH3+),
benzylamine, diphenylamine, methylaniline, triphenylamine, dimethylaniline, acetanilide, quinoline (C9H7N).

16.3.4.0.5 Diazo compounds
Diazo refers to the bleaching action of ultraviolet radiation on diazonium salts.
Diazo compounds, (2 linked nitrogen compounds), e.g. methyl orange, (dimethyl-aminoazobenzene sulfonic acid),
(diazonium ion: C6H5N2+, C6H5N+N), diazonium salts [(RNN+)Cl-], e.g., methyl orange, (dimethyl-aminoazobenzene sulfonic acid),
[(CH2)2NC6H4N=NC6H4SO2O-Na+] benzene diazonium chloride, chrysoidine azo compounds, (-N-N-), (diazonium ion + benzene
ring)

16.3.4.0.5a Barbiturates
See diagram 16.3.4.05a: Amylobarbital, barbital, pentobarbital, phenobarbital, quinalbarbital, sodium phenytoin, thiopental
Barbiturates, (central nervous system depressants), were formerly used as sedatives and hypnotics.
Barbituric acid is formed by condensing urea with diethyl malonate, an ester from apples.
Barbituric acid derivatives include the following:
1. Barbital (US), barbitone, C8H12N2O3, "Veronal", formerly used or attempted used by would-be suicides
2. Phenobarbital (US), phenobarbitone, C12H12N2O3, "Luminal", sedative and hypnotic, an anticonvulsant drug used to treat epilepsy.
Phenobarbital causes side effects, e.g. sedation, depression and agitation, so it may be replaced by phenytoin, C15H12N2O2, in the
anti-epileptic drug sodium phenytoin, "Dilantin".
3. Sodium thiopental, C11H17N2NaO2S, ("Sodium Pentathol", thiopentone sodium, "Trapanal"), "truth drug", is a short acting
barbiturate general anaesthetic, used to start anaesthesia, e.g. for caesarian section operation.
It causes unconsciousness in seconds.

16.3.4.0.5b Benzodiazepines
Benzodiazepines are ranquillizers, sedatives, and hypnotics.
See diagram 16.3.4.0.5b: Diazepam, C16H13ClN2O, (Valium),
Oxazepam (Serax),
Nitrazepam (Mogadon),
Chlordiazepoxide (Librium),
Flunitrazepam (Rohypnol).
Benzodiazepines assist the neurotransmitter γ-aminobutyric acid to treat anxiety, insomnia, seizures, and preparation for medical
procedures.

16.3.4.0.6 Aromatic halogen compounds
Aromatic halogen compounds, aryl halide, halogenarenes, e.g. benzyl chloride, (C6H5COCl)
See diagram 16.3.4.0.6: DDT, methoxychlor, Synergists: piperonyl butoxide
See diagram 16.13.3: Benzene hexachloride, chlorothalanil, DCPA, dalapon
See diagram 16.13.4: Aldrin, chlordane, dieldrin, endosulfan, heptachlor
16.7.2 Dalapon
Bromobenzene, iodobenzene, chlorobenzene, (BHC, benzene hexachloride, lindane), chlorothanil
Cyclodienes: chlordane, aldrin, dieldrin, heptachlor, endosulfan
DDT insecticide: (ClC6H4Cl)2CH(CCl3), (Former name: dichlorodiphenyltrichloroethane),
(New IUPAC name: 1,1,1-trichloro-2,2-bis, (4-chlorophenyl)ethane.)!

16.3.4.0.7 Aromatic sulfonic acids
Aromatic sulfonic acids, e.g. benzene sulfonic acid, (C6H5SO2OH), sodium benzene sulfonate

16.3.4.0.9 Aromatic alcohols
Aromatic alcohols, e.g. phenyl methanol, (benzyl alcohol), (C6H5CH2OH)

16.3.4.0.10 Aromatic aldehydes and ketones
Benison, C14H12O2, 2-Hydroxy-2-phenylacetophenone, 2-Hydroxy-1,2-Diphenylethanone, desyl alcohol, bitter almond oil
Benzaldehyde, benzenecarbaldehyde, benzene aldehyde, C6H5CHO, almond kernel flavouring, camphor is synthesized from
benzaldehyde in a condensation reaction.
See diagram 16.8.1

16.3.4.0.11 Aromatic acids
Aromatic acids and their derivatives, e.g. benzoic acid, (C6H5COOH)
See diagram 16.3.4.11: Acetyl salicyclic acid, (aspirin), | See diagram 16.3.4.12: Benzoic acid, caffeine, paracetamol, phenacetin
e.g. benzoic acid, (C6H5COOH), benzoyl chloride, (C6H5COCl), salicyclic acid, (1-hydroxybenzoic acid), (HOC6H4COOH),
aspirin, acetyl salicyclic acid, (2-acetoxy benzoic acid), [C6H4(OCOCH3)COOH] alcohol detergent, aromatic detergent, weed killer
2:4-dichlorophenoxyacetic acid, shikimic acid [C6H6(OH)3COOH]
Acetyl salicyclic acid is hydrolysed with hydrochloric acid to salicylic acid and acetic acid.
Sometimes old bottles of aspirin have a vinegar (acetic acid) smell because of this reaction.

16.3.4.0.12 Parabens
Parabens get their name from their origin as esters of parahydroxybenzoic acid., Parabens, HO.C6H4.CO.O-R, where R = alkyl group
See diagram 16.3.4.12: Parabens
See 19.4.4.23 Preservatives, food additives: E214 to E219
Parabens are esters of para-hydroxybenzoic acid and are used commonly as preservatives in cosmetics and food.
However, some parabens may cause allergic reactions in some people and affect DNA.
Some parabens are said to imitate oestrogen and are suspected of causing cancer, but there is no evidence that they are carcinogenic.
However, in Australia, some skin care products are labelled "Paraben free" because of this suspicion.
Propyl paraben, propyl 4-hydroxybenzoate, "Nipagin A", E216, is a natural subsonic but is usually manufactured for use as a food
preservative against fungi and as a cosmetics industry preservative.
Methyl paraben, methyl 4-hydroxybenzoate, "Nipagin B", E218, CH3(C6H4(OH)COO, is used as anti-fungal agent in hair gels and
similar products, it occurs in blueberries
Ethyl paraben, ethyl 4-hydroxybenzoate, E214, is used as a food preservative.

16.3.4.0.13 Pyridine
Pyridine, (pyridino), C5H5N, monodentate ligand
Pyridine molecule is a benzene molecule, C6H6, with one =CH- replacen by N.
Pyridine, C5H5N, has a penetrating offensive fishy odour and in some countries it is added to methylated spirit to deter ingestion.
Pyridine, Solution / mixture < 25%, Not hazardous

16.3.4.1a Benzofuranoids, benzopyranoids
See diagram 16.3.4.12: Coumarin, furan, bergamottin | See diagram 16.3.4.13: Bergamottin, lovastatin, atorvastatin
Atorvastatin calcium salt trihydrate, C33H34FN2O5.0.5Ca.1.5H2O
Benzofuranoids: (furan C4H4O), (benzofuran, coumarone, C8H6O, 2,3-benzofuran), (benzodifuran), (isobenzofuran)
Benzofuranoid derivatives used as anti-inflammatory constituents from Eupatorium cannabinum.
Benzopyranoids: (pyran, C5H6O, oxime, 2H pyran, 4H pyran), (1-benzopyrans), (3,4-dihydro-2H-1-benzopyran, chroman),
4-chromanone, C9H8O2), (chromone, C9H6O2), (2-chromeme), (3-chromeme), (flavone, C15H10O2), (flavanone C15H12O2),
(fisetin flovanol C15H10O6.nH2O), (coumarin, C9H6O2)
Benzopyrans, chromenes, have a benzene ring + heterocyclic pyran ring, C5H6O.

Coumarin
Coumarin, C9H6O2, 1,2-benzopyrone, a phenylpropanoid, colourless, crystalline, pleasant sweet odour, in many plants and
released on wilting, in perfumes, bitter aromatic burning taste, moderately heptotoxic, in Tonka bean | Aloe | Sweet woodruff
Coumarin is used to make anticoagulants which compete with vitamin K, e.g. warfarin, C19H16O4, a medical anticoagulant and rat
poison, e.g. "Ratsac".
Melitonin
Melilotin, C9H8O2, dihydrocoumarin, coumarin flavouring, in Melilotus officinalis
Scopoletin
Scopoletin, C10H8O4, a 7-hydroxycoumarin, 7-hydroxy-6-methoxycoumarin, chrysatropic acid, gelseminic acid, increases lipase
activity, plant growth factor, in Scopolia carniolica, anise, Angelica acutiloba

Umbelliferone
Umbelliferone, C9H6O3, 7-hydroxycoumarin, 7-hydroxychromen-2-one, yellow-white crystalline solid, absorbs UV light so in
sunscreens, mutagenic, a phenylpropanoid, possible antioxidant, in Apiaceae, (Umbelliferae) | Asafoetida | Chamomile |
Umbelliferone derivatives include furanocoumarins.
16.3.3.0 Furanocoumarins, furocoumarins

16.3.4.5 Five member heterocycles
See diagram 16.3.4.5: 5-member heterocycles | See diagram 14.05: Histamine,
major tranquillizers, tricyclic anti-depressants
Heterocyclic molecules have different atoms in the ring: furan C4H4O,
thiephene C4H4S, pyrrole, (CH)4NH, thiazole, C3SNH3

Saccharine, C7H5NO3S, saccharine
Relative sweetness of some artificial sweeteners: 19.2.8
Sense of taste, the gustatory system: 9.246, (See: 3.)
Saccharines: E954, Saccharines
Soft drinks, carbonated beverages: 15.8.6

Saccharin, 2-sulfobenzoic acid imide, o-benzoic sulfimide, aromatic, homomonocyclic compound,
contains only one benzene ring, odourless white crystals or crystalline powder, aqueous solution neutral or alkaline to litmus,
but not alkaline to phenolphthalein, effloresces in dry air, intensely sweet taste, flavoring agent, non-nutritive sweetener.
Saccharin, ammonium salt food additive, called "EAFUS": Everything Added to Food in the United States.

Histamine
Histamine
, C5H9N3, immidazole C3N2H4
Indole
Indole, C8H7N, [amino acid proline (CH2)3NHCHCOOH]

16.3.5.1 Terpenes, (C5H8)n
The molecular formulas of terpenes are multiples of isoprene, (C5H8)n, where n = number of isoprene units, linked to form linear chains
or rings.
Terpenes can be defined as a class of compounds composed of repeating 5-carbon units of hemiterpenes, (one isoprene units).
Terpenes, any terpenoid, volatile, aromatic hydrocarbons usually with isprenoid structure, in essential oils, usually in conifers or citrus
Terpenes may be removed from essential oils to prevent oxidation spoilage.
Terpenes are unsaturated hydrocarbons with of two or more isoprene, (C5H8) units, joined together.
Terpenes are unsaturated hydrocarbons formed by polymerization of two or more 5-carbon isoprene units, CH2:C(CH3)CH:CH2,
C5H8.
An isoprene unit has a four carbon chain and a one carbon branch at C2.
Terpenes, (isoprenoids), occur mostly in plant essential oils and may be isolated as a water-insoluble oil through distillation.
Terpenes contain functional groups, e.g. C=C, OH, C=O and may be acyclic or cyclic.
Terpenes are volatile organic compounds, (VOCs), and are flammable or combustible.
Terpenes may be poisonous and can cause painful rashes, e.g. Manchineel tree, (Hippomane mancinella), Cicutoxin water hemlock,
(Cicuta douglasii).
Phenolic compounds, often associated with terpenes, contain benzene rings with attached hydroxyl groups, (C-OH).
Terpenes may be organic solvents and cleaning agents with strong characteristic odours derived from pine trees or citrus fruit,
e.g. d-limonene, and turpentine, (a mixture of terpenes).

16.3.5.1a Terpenoids
Terpenoids, isoprenoids, (C5H8)n, are modified terpenes.
The largest group of natural products and are responsible for many scents and flavours..
Terpenoids are terpenes modified by oxidation or rearrangement of the carbon skeleton.
Terpenoids are natural products and related compounds derived from isoprene units.
They contain oxygen in various functional groups.