(2-Carboxyphenyl)acetic acid (o-Carboxymethyl)benzoic acid 2-Carboxybenzeneacetic acid 4-09-00-03343 (Beilstein Handbook Reference) 89-51-0 BRN 1872069 Benzeneacetic acid, 2-carboxy- EINECS 201-913-9 Homophthalic acid NSC 15185 Toluene-alpha,2-dicarboxylic acid alpha-Carboxy-o-toluic acid o-Toluic acid, alpha-carboxy- o-Toluic acid, alpha-carboxy- (8CI)