title: Flavan-3-ols from the rhizomes of Drynaria fortunei.
abstract: One monomer flavan-3-ol, 4α-carboxymethyl-(+)-catechin methyl ester, two monomer flavan-3-ol glycosides, (+)-afzelechin-3-O-β-allopyranoside, (+)-afzelechin-6-C-β-glucopyranoside, two dimer flavan-3-ols, (-)-epiafzelechin-(4β→8)-4β-carboxymethyl-(-)-epicatechin methyl ester, and -(-)-epiafzelechin-(4β→8)-4α-carboxymethyl-(-)epiafzelechin ethyl ester, and one trimer flavan-3-ol, (-)-epiafzelechin-(4β→8)-(-)-epiafzelechin-(4β→8)-4β-carboxymethyl-(-)-epiafzelechin methyl ester, together with thirteen known flavan-3-ols were isolated from the rhizomes of Drynaria fortunei (Kunze) J.Sm (Polypodiaceae). The structures were established by analysis of their HRESIMS, 1D, 2D NMR spectroscopic, and CD data. In order to obtain improved resolution, the high-resolution NMR spectra of the dimers and trimer were measured at -40 °C.
authors: The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China.
authors: Yong-hong
authors: YH
authors: Liang
authors: Min
authors: M
authors: Ye
authors: Wen-zhi
authors: WZ
authors: Yang
authors: Xue
authors: X
authors: Qiao
authors: Qing
authors: Q
authors: Wang
authors: Hai-jun
authors: HJ
authors: Yang
authors: Xiao-li
authors: XL
authors: Wang
authors: De-an
authors: DA
authors: Guo
mesh_terms: D003080:Cold Temperature; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry / Q000302:isolation & purification*; D029621:Polypodiaceae / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry
chemical_list: D005419:Flavonoids; D006027:Glycosides; D011108:Polymers; C404987:flavan-3-ol