| Literature DB >> 11754604 |
Y J Zhang1, T Abe, T Tanaka, C R Yang, I Kouno.
Abstract
Six new ellagitannins, phyllanemblinins A-F (1-6), were isolated from Phyllanthus emblica, along with 30 known tannins and related compounds. Their structures were determined by spectral and chemical methods. Phyllanemblinins A (1) and B (2) were confirmed to be ellagitannins having a tetrahydroxybenzofuran dicarboxyl group and a hexahydroxydiphenoyl group, respectively, by chemical synthesis from furosin (8). Phyllanemblinin C (3) has a new acyl group at the glucose 2,4-positions and is structurally related to chebulagic acid. Phyllanemblinins D (4), E (5), and F (6) were found to be positional isomers of neochebuloyl 1(beta)-O-galloylglucose.Entities:
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Year: 2001 PMID： 11754604 DOI： 10.1021/np010370g
Source DB: PubMed Journal: J Nat Prod ISSN： 0163-3864 Impact factor: 4.050