The composition of GSLs in broccoli microgreens. PRO, Progoitrin; GRA, glucoraphanin; SIN, sinigrin; 4-HGBS, 4-hydroxy-glucobrassicin; GBN, glucobrassicanapin; GER, glucoerucin; GBS, glucobrassicin; 4-MGBS, 4-methoxy-glucobrassicin; NGBS, neoglucobrassicin.