Tannins and related polyphenols of rosaceous medicinal plants. IV. Roxbins A and B from Rosa roxburghii fruits.
Takashi YoshidaFaculty of Pharmaceutical Sciences, Okayama UniversityXinmin ChenChengdu Institute of Biology, The Chinese Academy of SciencesTsutomu HatanoFaculty of Pharmaceutical Sciences, Okayama UniversityMakoto FukushimaLaboratories, Pola CorporationTakuo OkudaFaculty of Pharmaceutical Sciences, Okayama University
1987en
ABI
Abstract
From the unripe fruits of Rosa roxburghii TRATT., two new hydrolyzable tannins, roxbin A (1) (a dimeric ellagitannin) and roxbin B (9), were isolated along with rugosin F (2), pedunculagin (3), casuarictin (4), alnusiin (5), stachyurin (6), tellimagrandin 11 (7), 2, 3-Ο- (S) -hexahydroxydiphenoyl-D-glucose and (+) -catechin. The structures of new tannins were elucidated on the basis of chemical and spectral evidence.
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