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 tannic ...

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 ''Paeonia lactiflora'' (Chinese peony, Chinese herbaceous peony, or common garden peony) is a species of herbaceous perennial flowering plant in the family Paeoniaceae, native to central and eastern Asia from eastern Tibet across northern Chi ...

''), 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 ''Jatropha macrantha'', also called the ''huanarpo macho'', is a medium size shrubby tree species in the genus ''Jatropha'' with orange red flowers. It is indigenous to Peru. It is as popular in Peru as Muira Puama is in Brazil. Catechin, ca ...

''). (−)-Catechin 7-O-β-d-glucopyranoside is found in the bark of ''

Rhaphiolepis umbellata ''Rhaphiolepis umbellata'' is a species of flowering plant in the family Rosaceae, native to Korea, Japan and Taiwan. Growing to tall and wide, it is an evergreen shrub with glossy oval leaves, and scented white flowers, sometimes tinged wit ...

''.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 '' Fago ...

groats, in the red bean (the seed of ''

Vigna umbellata ''Vigna umbellata'', previously ''Phaseolus calcaratus'', is a warm-season annual vine legume with yellow flowers and small edible beans. It is commonly called ricebean or rice bean. To date, it is little known, little researched and little ex ...

'', formerly known as ''Phaseolus calcaratus''),, in barley (''

Hordeum vulgare Barley (''Hordeum vulgare''), a member of the grass family, is a major cereal grain grown in temperate climates globally. It was one of the first cultivated grains, particularly in Eurasia as early as 10,000 years ago. Globally 70% of barley pr ...

'' L.) and malt. (−)-Catechin 7-O-β-d-glucopyranoside is found in

rhubarb Rhubarb is the fleshy, edible stalks ( petioles) of species and hybrids (culinary rhubarb) of ''Rheum'' in the family Polygonaceae, which are cooked and used for food. The whole plant – a herbaceous perennial growing from short, thick rhizo ...

Health effects

This compound has an antioxidant activity leading to a cytoprotective effect.

References

{{flavanol Flavanols Flavonoid glucosides