Methyl N-cyanoacetimidate5652-84-6100 % similar Ethyl N-cyanoacetimidate1558-82-354 % similar Dimethyl N-cyanodithioiminocarbonate10191-60-336 % similar Methyl cyanoformate17640-15-231 % similar Diphenyl cyanocarbonimidate79463-77-730 % similar