Conversion of glucosinolates to isothiocyanates catalyzed by plant myrosinase, and structures of BITC, PEITC, and sulforaphane. Glucotropaeolin, gluconasturtiin, and glucoraphanin are the characteristic major glucosinolates in garden cress, watercress, and broccoli sprouts, respectively. Minor products in addition to the isothiocyanates are also observed.