66871-60-1 N-(3,4-Dimethylphenyl)-N'-(imino(methylamino)methyl)-urea hydrochloride Urea, 1-(3,4-dimethylphenyl)-3-methylamidino-, hydrochloride Urea, N-(3,4-dimethylphenyl)-N'-(imino(methylamino)methyl)-, monohydrochloride