2,3,4-TRIHYDROXYBENZOIC ACID 2,3,4-Trihydroxybenzene carboxylic acid 2,3,4-Trihydroxybenzoate 4-10-00-01971 (Beilstein Handbook Reference) 4-Pyrogallolcarboxylic acid 610-02-6 BRN 2210807 Benzoic acid, 2,3,4-trihydroxy- EINECS 210-205-9 NSC 27436 Pyrogallolcarboxylic acid