68656-69-9 N'-(Aminoiminomethyl)-N-(2,6-dimethylphenyl)-N-ethyl-urea hydrochloride Urea, 3-amidino-1-ethyl-1-(2,6-xylyl)-, hydrochloride Urea, N'-(aminoiminomethyl)-N-(2,6-dimethylphenyl)-N-ethyl-, monohydrochloride