(organic chemistry) an auxin plant hormone, synthesized in leaves, that stimulates growth, especially in the presence of ethylene

(organic chemistry) a white crystalline dicarboxylic acid, CH₂(COOH)₂, used in making barbiturates

(chemistry) A pale yellow liquid, H₃PO₂, used as a reducing agent.

(organic chemistry) An organic compound, 6-methyl-9,10-didehydro-ergoline-8-carboxylic acid, derived from an alkaloid found in ergot; its amide derivatives are widely used as pharmaceuticals and as hallucinogenic drugs (LSD).

(inorganic chemistry) A colourless liquid, H₃PO₄, used in the manufacture of fertilizers, detergents and pharmaceuticals and as an additive in cola drinks.

(chemistry) a solution of hydrogen cyanide, HCN, in water; a weak poisonous acid, used as a fumigant

(organic chemistry) A colourless crystalline dicarboxylic acid, hydroxy-malonic acid, found in wine, apples and other fruit; it is converted to lactic acid by malolactic fermentation.

(biochemistry) A water-soluble antioxidant vitamin, 3-[(2R)-2,4-dihydroxy-3,3-dimethylbutanamido]propanoic acid needed for the metabolism of carbohydrates, fats and proteins; it is found in cereals, legumes, meat and other foods

(chemistry) A triterpenoid organic acid that is found in Pistacia resin.

(organic chemistry) An unsaturated fatty acid cis-6-octadecenoic acid found in many members of the family Apiaceae (e.g. parsley seed oil); it is a positional isomer of oleic acid, the double bond being in position 6 instead of 9.