Precursors mustard oils

Isothiocyanates ( mustard oils ) and their glucosinolate precursors are widely distributed in higher plants, especially among cruciferous vegetables, and it has been established recently that sulforaphane, found in various species and particularly in broccoli, is the major source of their anticarcinogenic action [181]. 

Two small but distinctive groups of natural products found in higher plants which show a clear and definite relationship to their biosynthetic precursors, the a-L-amino acids, are the cyanogenic glycosides (128)162,163 jjjg mustard oil glucosides or glucosinolates... 

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