Catechin-7-O-glucoside is a flavan-3-ol glycoside formed from catechin.
Natural occurrences Catechin-7-O-glucoside can be isolated from the hemolymph of the European pine sawfly (Neodiprion sertifer). It also occurs in relatively large quantities in cowpea (Vigna unguiculata) as the dominant flavan-3-ol monomer, and actually accounts for up to 70% of cowpea proanthocyanidins (tannins).
It can also be produced by biotransformation of (+)-catechin by cultured cells of Eucalyptus perriniana.
Presence in natural traditional drugs Catechin-7-O-glucoside can be found in paeoniae radix, the crude drug made from the roots of Chinese peony (Paeonia lactiflora), in red knotweed (Bistorta macrophylla, also known as Polygonum macrophyllum), in the stem barks of the Nepali hog plum (Choerospondias axillaris),) in the Korean plum yew (Cephalotaxus koreana) and in Huanarpo Macho (Jatropha macrantha). (−)-Catechin 7-O-β-D-glucopyranoside is found in the bark of Rhaphiolepis umbellata.
Presence in food It is found in buckwheat groats,Report on cereals at Phenol-Explorer.eu. Retrieved 18 December 2012. in the red bean (the seed of Vigna umbellata, formerly known as Phaseolus calcaratus),, in barley (Hordeum vulgare L.) and malt. (−)-Catechin 7-O-β-D-glucopyranoside is found in rhubarb.
Health effects This compound has an antioxidant activity leading to a cytoprotective effect.
References