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catechin
ˈcatechin Chem. A substance obtained from catechu, etc., after the removal of the tannin; a white powder composed of very small silky needles.1853 Pharm. Jrnl. XIII. 79 He has detected catechine in kino. 1876 Harley Mat. Med. 641 The insoluble portion is a mass of acicular crystals, catechin or cate...
Oxford English Dictionary
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Catechin
The most common catechin isomer is (+)-catechin. The other stereoisomer is (−)-catechin or ent-catechin. Mixtures of the different enantiomers can be called (±)-catechin or DL-catechin and (±)-epicatechin or DL-epicatechin.
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Catechin-7-O-glucoside
Catechin-7-O-glucoside is a flavan-3-ol glycoside formed from catechin. It can also be produced by biotransformation of (+)-catechin by cultured cells of Eucalyptus perriniana.
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Malvidin glucoside-ethyl-catechin
Malvidin glucoside-ethyl-catechin is a flavanol-anthocyanin adduct. Acetaldehyde-induced reactions yield ethyl-linked species such as malvidin glucoside-ethyl-catechin.
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Prodelphinidin
Gallocatechin-(4→8)-catechin (prodelphinidin B3), gallocatechin-(4→8)-gallocatechin and catechin-(4→8)-gallocatechin can be found in the pomegranate peels Particular oligomeric prodelphinidins
Prodelphinidin B3 (gallocatechin-(4α→8)-catechin) and prodelphinidin B9 (epigallocatechin-(4α→8)-catechin) can be
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Flavan-3-ol
Catechin and epicatechin are epimers, with (–)-epicatechin and (+)-catechin being the most common optical isomers found in nature. Catechin gallates are gallic acid esters of the catechins; an example is epigallocatechin gallate, which is commonly the most abundant catechin in tea.
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Jatropha macrantha
Catechin, catechin-7-O-β-glucopyranoside and procyanidin B3 can be found in Huanarpo Macho.
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Rhaphiolepis umbellata
The bark contains (−)-catechin 7-O-β-d-glucopyranoside and (+)-catechin 5-0-β-d-glucopyranoside.
References
Flora of Korea
Flora of Japan
umbellata
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Phloroglucinol carboxylic acid
It is a catechin degradation product excreted by the bacterium Acinetobacter calcoaceticus, a species of bacteria part of the human body normal flora, grown on catechin as sole source of carbon.
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Procyanidin B6
Procyanidin B6 is a catechin-(4α→6)-catechin dimer. It can be found in grape seeds and in beer. Chemical synthesis
Molar equivalents of synthetic (2R,3S,4R or S)-leucocyanidin and (+)-catechin condense with exceptional rapidity at pH 5 under ambient
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Procyanidin B3
Procyanidin B3 is a catechin dimer (catechin-(4α→8)-catechin). Chemical synthesis
Molar equivalents of synthetic (2R,3S,4R or S)-leucocyanidin and (+)-catechin condense with exceptional rapidity at pH 5 under ambient
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Procyanidin C1
-(4α-8)-catechin-(4α-8)-catechin trimer (procyanidin C2), epicatechin-(4β-8)-epicatechin-(4β-8)-catechin trimer and epicatechin-(4β-8)-catechin-(4α-8)- Finally, deprotection of (+)-catechin and (-)-epicatechin trimers derivatives gives four natural procyanidin trimers in good yields.
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B type proanthocyanidin
B4 or catechin-(4α→8)-epicatechin
Molecules with 4→6 bonds
Procyanidin B5 or epicatechin-(4β→6)-epicatechin
Procyanidin B6 or catechin-(4α→6)-catechin -4α→8-(+)-catechin dimer).
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Proanthocyanidin B3
Proanthocyanidin B3 may refer to:
Procyanidin B3, a catechin dimer
Prodelphinidin B3, a gallocatechin-catechin dimer
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Leucoanthocyanidin reductase
In enzymology, a leucoanthocyanidin reductase () (LAR, aka leucocyanidin reductase or LCR) is an enzyme that catalyzes the chemical reaction
(2R,3S)-catechin The systematic name of this enzyme class is (2R,3S)-catechin:NADP+ 4-oxidoreductase. This enzyme is also called leucocyanidin reductase.
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