6-Methyl-5-propionyl-benzimidazole-2-carboxylic acid 、
6-Methyl-5-valeryl-benzimidazol-2-carbonsaeure 、 、 5-Butyryl-6-methoxy-benzimidazole-2-carboxylic acid 、 5-Butyryl-6-chloro-benzimidazole-2-carboxylic acid 、
5-cyclopropanecarbonyl-6-methyl-1(3)H-benzoimidazole-2-carboxylic acid 、 5-Cyclohexylcarbonyl-6-methyl-benzimidazole-2-carboxylic acid 、 5-(4-Methoxy-butyryl)-6-methyl-benzimidazole-2-carboxylic acid 、 6-Methyl-5-(4-methylthiobutyryl)-benzimidazole-2-carboxylic acid 、 6-Methyl-5-(4-methylsulphinyl-butyryl)-benzimidazole-2-carboxylic acid 、 6-Methyl-5-(4-phenylthio-butyryl)-benzimidazole-2-carboxylic acid 、 6-Methyl-5-(4-phenylsulphinyl-butyryl)-benzimidazole-2-carboxylic acid 、 Methyl 5-butyryl-6-methyl-benzimidazole-2-carboxylate 生成 5-Acetyl-6-methyl-benzimidazole-2-carboxylic acid