68656-52-0 N-(2,4-Dimethoxyphenyl)-N'-(imino(methylamino)methyl)-urea hydrochloride Urea, 1-(2,4-dimethoxyphenyl)-3-methylamidino-, hydrochloride Urea, N-(2,4-dimethoxyphenyl)-N'-(imino(methylamino)methyl)-, monohydrochloride