68656-55-3 N-(4-Cyanophenyl)-N'-(imino(propylamino)methyl)-urea hydrochloride Urea, 1-(p-cyanophenyl)-3-propylamidino-, hydrochloride Urea, N-(4-cyanophenyl)-N'-(imino(propylamino)methyl)-, monohydrochloride