Isopropyl isothiocyanate2253-73-835 % similar Trimethylsilyl isothiocyanate2290-65-535 % similar Ethyl isothiocyanate542-85-835 % similar tert-Butyl isothiocyanate590-42-135 % similar Methyl isocyanate624-83-933 % similar Propyl isothiocyanate628-30-832 % similar Isobutyl isothiocyanate591-82-230 % similar 1,4-Diisothiocyanatobutane4430-51-730 % similar