1H-benzimidazole-1-carboxylic acid, 2-[(ethoxycarbonyl)amino]-, ethyl ester InChI=1/C13H15N3O4/c1-3-19-12(17)15-11-14-9-7-5-6-8-10(9)16(11)13(18)20-4-2/h5-8H,3-4H2,1-2H3,(H,14,15,17 ethyl 2-[(ethoxycarbonyl)amino]-1H-benzimidazole-1-carboxylate