Catechin 5-''O''-glucoside is a flavanol glucoside. It can be 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 ...

and 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, It can also be formed from (+)-catechin by plant-cultured cells of ''

Eucalyptus perriniana ''Eucalyptus perriniana'', commonly known as spinning gum, is a tree or mallee which is native to New South Wales, the Australian Capital Territory, Victoria and Tasmania. Spinning gum is a sub-alpine species and grows in areas which are normall ...

''.Biotransformation of (+)-catechin by plant-cultured cells of Eucalyptus perriniana. Shuichi Otani, Yoko Kondo, Yoshihisa Asada, Tsutomu Furuya, Hatsuyuki, Hamada, Nobuyoshi Nakajima, Kohji Ishihara and Hiroki Hamada, Plant Biotechnology, 2004, 21(5), pages 407–409
article
)

References

Flavanols Flavonoid glucosides {{aromatic-stub