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Rubriflorin A and B, Two Novel Partially Saturated Dibenzocyclooctene Lignans from Schisandra rubriflora

✍ Scribed by Liang Li; Hai-Ying Ren; Xiao-Dong Yang; Jing-Feng Zhao; Gan-Peng Li; Hong-Bin Zhang

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
126 KB
Volume
87
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

From the stems of Schisandra rubriflora, two novel partially saturated dibenzocyclooctene lignans, named rubriflorin A (1) and B (6), as well as the seven known partially saturated dibenzocyclooctene lignans kadsumarin A (2), kadsurin (3), heteroclitin B (4), heteroclitin C (5), heteroclitin D (7), interiorin (8), and interiorin B (9) were isolated. The structures of the new compounds 1 and 6 were established on the basis of spectral analysis as (5__R__,6__S__,7__R__,8__R__,13a__S__)‐8‐(acetyloxy)‐5,6,7,8‐tetrahydro‐1,2,3,13‐tetramethoxy‐6,7‐dimethylbenz([3,4]cycloocta[1,2‐f][1,3]benzodioxol‐5‐yl (2__Z__)‐2‐methylbut‐2‐enoate and (6__R__,7__R__,12a__S__)‐7,8‐dihydro‐12‐hydroxy‐1,2,3,10,11‐pentamethoxy‐6,7‐dimethyl‐6__H__‐dibenzo[a,c]cycloocten‐5‐one, respectively.

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