In vitro: |
J Nat Prod. 2006 Dec;69(12):1697-701. | Rubrisandrins A and B, lignans and related anti-HIV compounds from Schisandra rubriflora.[Pubmed: 17190445 ] | METHODS AND RESULTS:
Bioactivity-directed fractionation of an ethanolic extract of the fruits of Schisandra rubriflora led to the isolation and identification of dibenzocyclooctadiene lignans including the new lignans rubrisandrins A (1a + 1b) and B (2) and the known lignans gomisin J (3), (+/-)-gomisin M1 (R(+)-Gomisin M1,4), (+)-gomisin M2 (5), schisanhenol (6), deoxyschisandrin, schisantherin B, schisandrin, tigloylgomisin P, gomisin O, angeloylgomisin P, and epigomisin O. Their structure and stereochemistry were determined by spectroscopic methods, including 2D-NMR techniques. Compounds 1 and 3-6 were active as anti-HIV agents.
CONCLUSIONS:
(+/-)-Gomisin M1 (R(+)-Gomisin M1,4) exhibited the most potent anti-HIV activity, with EC50 and therapeutic index (TI) values of <0.65 microM and >68, respectively. |
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