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Catechin-5-O-glucoside
Catechin 5-''O''-glucoside is a flavanol glucoside. It can be found in rhubarb and 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, 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 407–409article) References Flavanols Flavonoid glucosides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 rhizomes – is also called rhubarb. Historically, different plants have been called "rhubarb" in English. The large, triangular leaves contain high levels of oxalic acid and anthrone glycosides, making them inedible. The small flowers are grouped in large compound leafy greenish-white to rose-red inflorescences. The precise origin of culinary rhubarb is unknown. The species ''Rheum rhabarbarum'' (syn. ''R. undulatum'') and '' R. rhaponticum'' were grown in Europe before the 18th century and used for medicinal purposes. By the early 18th century, these two species and a possible hybrid of unknown origin, ''R.'' × ''hybridum'', were grown as vegetable crops in England and Scandinavia. They readily hybridize, and culinary rh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 normally snow covered for several months in winter. However domestic cultivars can grow in almost any temperate climate. Description ''Eucalyptus perriniana'' is a tree which sometimes grows to a height of or a mallee with smooth, copper-coloured bark which often turns white, grey or greenish as it ages before being shed in short ribbons each year. Its adult leaves are lance-shaped, greyish-green, long and wide. The juvenile leaves are arranged in opposite pairs, more or less round and lack a peduncle. The flowers are arranged in groups of three and the flower buds are long and in diameter. The flower caps are cone-shaped or hemispherical and the fruit is long and in diameter. Taxonomy and naming ''Eucalyptus perriniana'' was first form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 with pink, in early summer. This plant has gained the Royal Horticultural Society The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nor ...'s Award of Garden Merit. It is used in Japan as an astringent and a dyeing agent. The bark contains (−)-catechin 7-O-β-d-glucopyranoside and (+)-catechin 5-0-β-d-glucopyranoside. File:厚葉石斑木 Rhaphiolepis umbellata 20210324101356 04.jpg, The veins of the leaves are obvious and special. File:厚葉石斑木 Rhaphiolepis umbellata 20210324101356 11.jpg, The sprouts are covered with white fluff. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flavanols
Flavan-3-ols (sometimes referred to as flavanols) are a subgroup of flavonoids. They are derivatives of flavans that possess a 2-phenyl-3,4-dihydro-2''H''-chromen-3-ol skeleton. Flavan-3-ols are structurally diverse and include a range of compounds, such as catechin, epicatechin gallate, epigallocatechin, epigallocatechin gallate, proanthocyanidins, theaflavins, thearubigins. They are found in most plants and have a role in plant defense. Chemical structure The single-molecule (monomer) catechin, or isomer epicatechin (see diagram), adds four hydroxyls to flavan-3-ol, making building blocks for concatenated polymers (proanthocyanidins) and higher order polymers (anthocyanidins). Flavan-3-ols possess two chiral carbons, meaning four diastereoisomers occur for each of them. They are distinguished from the yellow, ketone-containing flavonoids such as quercitin and rutin, which are called flavonol, flavonols. Early use of the term bioflavonoid was imprecisely applied to include ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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