1H-Benzimidazole-5-carboxylic acid, 7-(aminosulfonyl)-1,2-dimethyl- 5-25-09-00242 (Beilstein Handbook Reference) 7-(Aminosulfonyl)-1,2-dimethyl-1H-benzimidazole-5-carboxylic acid 72020-25-8 BRN 0926743