2-[2-(4-cyanophenyl)-ethyl]-1-methyl-benzimidazol-5-yl-carboxylic acid-N-(4-cyanobenzyl)-N-ethoxycarbonylmethyl-amide 以89%的产率得到2-[2-(4-Amidinophenyl)-ethyl]-1-methyl-benzimidazol-5-yl-carboxylic Acid-N-(4-amidino-benzyl)-N-ethoxycarbonylmethyl-amide-dihydrochloride