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Three New Orcinol-Conjugated Hydrolysable Tannins from the Leaves of Cleyera japonica
2013
Chemical and pharmaceutical bulletin
Three new orcinol (3-hydroxy-5-methylphenol)-conjugated hydrolysable tannins, together with two known compounds were isolated from the leaves of Cleyera japonica (CJ), and have been tentatively named cleyeratannin A (1), cleyeratannin B (2) and cleyeratannin C (3). The chemical structures of these compounds were elucidated using 1 dimensional (1D)/2D NMR and high resolution FAB-MS, and the absolute configuration was confirmed by circular dichroism (CD). To evaluate their anti-oxidative
doi:10.1248/cpb.c12-00572
pmid:23449204
fatcat:qvnpvi2qd5ctlnmkmfyvfv7vve