Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Chapters: Catechin, Epigallocatechin Gallate, Theaflavin, Afzelechin, Flavan-3-Ol, Gallocatechol, Epicatechin Gallate, Robinetinidol, Mesquitol, Fisetinidol. Excerpt: Afzelechin Afzelechin is a flavan-3ol, a type of flavonoids. It can be found in Bergenia ligulata (aka Paashaanbhed in Ayurveda traditional Indian medicine) . Metabolism (2R,3S)-catechin: NADP+ 4-oxidoreductase transforms cis-3,4-leucopelargonidin into afzelechin . Glycosides Arthromerin A (afzelechin-3-O- -D-xylopyranoside) and arthromerin B (afzelechin-3-O- -D-glucopyranoside) are afzelechin glycosides isolated from the roots of Arthromeris mairei . (+)-afzelechin-O- -4'-D-glucopyranoside can be isolated from the rhizomes of Selliguea feei . Proanthocyanidins dimers Afzelechin-(4alpha 8)-afzelechin (molecular formula: o0H26O10, molar mass: 546.52 g/mol, exact mass: 546.152597, CAS number: 101339-37-1, Pubchem CID: 12395) is a B type proanthocyanidin . Ent-epiafzelechin-3-O-p-hydroxybenzoate-(4 8,2 O 7)-epiafzelechin) is an A-type proanthocyanidin found in apricots ( Prunus armeniaca ) . Trimers Selligueain A (epiafzelechin-(4 -8,2 -0-7)-epiafzelechin-(4 -8)-afzelechin) is a A type proanthocyanidin . references (URLs online) A hyperlinked version of this chapter is at Catechin item IUPAC name (2 R,3 S )-2-(3,4-dihydroxyphenyl)-3,4-dihydro-2 H -chromene-3,5,7-triol item other names Catechol Cianidanol Cyanidanol (+)-catechin D-Catechin Catechinic acid Catechuic acid Cianidol Dexcyanidanol (2R,3S)-Catechin 2,3-trans-catechin 3,3',4',5,7 flavanpentol item Identifiers item CAS number: 7295-85-4, ( ) 154-23-4 (+) 18829-70-4 (-) item PubChem: 9064 item ChemSpider: 8711 item SMILES: Oc1ccc(cc1O) 3Oc2cc(O)cc(O)c2C 3O item InChI: 1/n5H14O6/c16-8-4-11(18)9-6-13(20)15(21-14(9)5-8)7-1-2-10(17)12(19)3-7/h1-5,13,15-20H,6H2...