1H-Benzimidazole-5-carboxylic acid, 7-(aminosulfonyl)-1-butyl-2-methyl- 5-25-09-00242 (Beilstein Handbook Reference) 7-(Aminosulfonyl)-1-butyl-2-methyl-1H-benzimidazole-5-carboxylic acid 72020-29-2 BRN 0932143