Catechin-7-''O''-glucoside is a flavan-3-ol glycoside formed from

catechin Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids. The name of the catechin chemical family derives from ''catechu'', which is the tanni ...

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 (+)-

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 roots of the Chinese peony ('' Paeonia lactiflora''), in the 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''.Flavanol glucosides from rhubarb and Rhaphiolepis umbellata. Gen-Ichiro Nonaka, Emiko Ezakia, Katsuya Hayashia and Itsuo Nishioka, Phytochemistry, Volume 22, Issue 7, 1983, Pages 1659–1661,

Presence in food

It is found in

buckwheat Buckwheat (''Fagopyrum esculentum''), or common buckwheat, is a flowering plant in the knotweed family Polygonaceae cultivated for its grain-like seeds and as a cover crop. The name "buckwheat" is used for several other species, such as ''Fagopy ...

groats, 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

{{flavanol Flavanols Flavonoid glucosides