Tetrahydrofurfuryl isothiocyanate异硫氰酸四氢糠酯2-(Isothiocyanatomethyl)tetrahydrofuran(Tetrahydrofur-2-yl)methyl isothiocyanate2-(Isothiocyanatomethyl)-1-oxacyclopentane2-(Isothiocyanatomethyl)oxolane2-(Isothiocyanatomethyl)tetrahydrofuran 97%2-Tetrahydrofurfuryl isothiocyanate