2-Amino-5-(3-amino-propylidene)-1,5-dihydro-imidazol-4-one dihydrochloride 、
dihydrosventrin hydrochloride 、 以gave 0.048 g (47%) of the title compound 32 as a tan solid ((Z)-isomer exclusively)的产率得到4,5-Dibromo-1-methyl-pyrrole-2-carboxylic acid [3-(2-amino-5-oxo-3,5-dihydro-imidazol-4-ylidene)-propyl]-amide hydrochloride