1-(1-Ethylpropyl)-2,6-dimethyl-7-nitro-1H-benzimidazole-5-carboxylic acid 127971-62-4 1H-Benzimidazole-5-carboxylic acid, 2,6-dimethyl-1-(1-ethylpropyl)-7-nitro- 2,6-Dimethyl-1-(1-ethylpropyl)-7-nitro-1H-benzimidazole-5-carboxylic acid