77893-24-4 GUANIDINE, 2-CYANO-1-METHYL-3-(2-(((4-METHYL-4-IMIDAZOLIN-5-YL)METHYL)THIO)ETHYL Guanidine, 2-cyano-1-methyl-3-(2-(((4-methyl-4-imidazolin-5-yl)methyl)thio)ethyl)-1-nitroso- Mononitrosocimetidine