N-<<1-Methyl-4-<1-methyl-4-(guanidinoacetamido)pyrrole-2-carboxamido>pyrrol-2-yl>carbonyl>-L-alanine tert-butyl ester acetate 、
三氟乙酸 以89%的产率得到N-<<1-Methyl-4-<1-methyl-4-(guanidinoacetamido)pyrrole-2-carboxamido>pyrrol-2-yl>carbonyl>-L-alanine trifluoroacetate