secondary metabolite biosynthesis glucosinolate biosynthesis UPa:UPA00741 pathway Biosynthesis of glucosinolates, a class of organic compounds that contain sulfur, nitrogen and a group derived from glucose. Glucosinolates occur as secondary metabolites of many plants of the order Brassicales (especially in the family Brassicaceae, furthermore Capparidaceae and Caricaceae), but also in the genus Dryetes (family Euphorbiaceae). Plants use substances derived from glucosinolates as natural pesticides and as defense against herbivores. GO:0019761