(organic chemistry) The aromatic carboxylic acid C₆H₅-CH=CH-COOH obtained from cinnamon; it is used in perfumery etc

(inorganic chemistry) The monobasic acid NH₂-CS₂H that is formally derived from carbamic acid by replacing both oxygen atoms with sulfur

(organic chemistry) An explosive isomer of cyanuric acid

(organic chemistry) The aldehyde acid CHO-COOH found in unripe fruit, and as a component of the glyoxylate cycle

(inorganic chemistry) The poisonous and explosive compound HN₃

(inorganic chemistry) The unstable compound HNO

(inorganic chemistry) The oxyacid of phosphorus H₄P₂O₆

fulminic acid

(biochemistry) An isomer of citric acid that is involved in the citric acid cycle

(organic chemistry) The isomer of phthalic acid benzene-1,3-dicarboxylic acid used in the synthesis of polymers.