((Methylamino)((2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)amino)methylene)urea 77076-18-7 Guanylurea cimetidine Urea, ((methylamino)((2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)amino)methylene)-