25786-97-4 NSC66750 Urea, 1,1'-(2-methyl-p-phenylene)bis[3-(m-2-imidazolin-2-ylphenyl)-, dihydrochloride Urea, N,N''-(2-methyl-1,4-phenylene)bis[N'-[3-(4,5-dihydro-1H-imidazol-2-yl)phenyl]-, dihydrochloride