2,3 DHB 2,3-DIHYDROXYBENZOIC ACID 2-Pyrocatechuic acid 3-Hydroxysalicylic acid 303-38-8 4-10-00-01414 (Beilstein Handbook Reference) 875-28-5 BRN 2209117 Benzoic acid, 2,3-dihydroxy- Catecholcarboxylic acid DHBA DOBK EINECS 206-139-5 NSC 27435 Pyrocatechuic acid o-Pyrocatechuic acid (6CI,8CI)