4-amino-1-(3-methyl-butyl)-1H-pyrrole-2-carboxylic acid (3-carbamimidoyl-propyl)-amide 、 1-(3-Methyl-butyl)-4-nitro-1H-pyrrole-2-carboxylic acid (3-carbamimidoyl-propyl)-amide hydrochloride 、
terephthalic acid bis-pentafluorophenyl ester 以21%的产率得到N,N'-Bis-[5-(3-carbamimidoyl-propylcarbamoyl)-1-(3-methyl-butyl)-1H-pyrrol-3-yl]-terephthalamide