Quercetin 3-O-sophoroside is a flavonoid glycoside that has been found in B. napus (rapeseed) and has antioxidant activity.1,2,3 Quercetin 3-O-sophoroside has a relative antioxidant capacity of 1.45 compared to Trolox in an ABTS assay.3 It also inhibits lipid peroxidation in a cell-free assay using phospholipid liposomes with an IC50 value of 9.2 μM.
1.Ferreres, F., Taveira, M., Pereira, D.M., et al.Tomato (Lycopersicon esculentum) seeds: new flavonols and cytotoxic effect.J. Agric. Food Chem.58(5)2854-2861(2010) 2.Wang, Y., Meng, G., Chen, S., et al.Correlation analysis of phenolic contents and antioxidation in yellow- and black-seeded Brassica napusMolecules23(7)e1815(2018) 3.Plumb, G.W., Price, K.R., Modes, M.J.C., et al.Antioxidant properties of the major polyphenolic compounds in broccoliFree Radic. Res.27(4)429-435(1997)