(organic chemistry) Piperidine-2-carboxylic acid, a small organic molecule and the carboxylic acid of piperidine, associated with some forms of epilepsy.

(organic chemistry) The phenolic carboxylic acid 3-(3,4-dihydroxyphenyl 2-propenoic acid that is an intermediate in the biosynthesis of lignin

orotic acid

plural of acid rain

plural of acid test

(organic chemistry) Any of six isomeric dihydroxy derivatives of benzoic acid.

(organic chemistry) The carboxylic acid (E)-3-(4-hydroxy-3-methoxy-phenyl)prop-2-enoic acid that is a component of lignin

(organic chemistry) The aromatic carboxylic acid 4-hydroxy-3-methoxybenzoic acid that is an intermediate in the production of vanillin from ferulic acid

(organic chemistry) Any of three isomeric phenolic derivatives of benzoic acid; carboxyphenol

(organic chemistry) The heterocyclic compound 2-thioxodihydropyrimidine-4,6(1H,5H)-dione that is used in biochemical assay