(organic chemistry) A naturally occurring O-methylated trihydroxybenzoic acid found in various plants.

(organic chemistry) An O-methylated trihydroxybenzoic acid found in eucalyptus.

(organic chemistry) A carboxylic acid 5-oxotetrahydro-3-furancarboxylic acid that is isomeric with itaconic acid, citraconic acid, and mesaconic acid

(organic chemistry) The trans isomer of the fatty acid ricinoleic acid.

(organic chemistry) A dicarboxylic acid related to pyrone found in certain poppies.

gentisic acid

(organic chemistry) 2,5-dihydroxybenzoic acid produced by carboxylation of hydroquinone

(organic chemistry) A dicarboxylic acid, composed of two carboxylated quinoline rings, that is used for protein assay

(organic chemistry) Any of a group of compounds having two hydroxamic acid groups, especially those chiral compounds having two adjacent hydroxamic acid groups that are used in asymmetric synthesis.

(organic chemistry) The thiocarboxylic acid analogous to benzoic acid C₆H₅-CO-SH