title: Rubrisandrins A and B, lignans and related anti-HIV compounds from Schisandra rubriflora.
abstract: 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 (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. (+/-)-Gomisin M1 (4) exhibited the most potent anti-HIV activity, with EC50 and therapeutic index (TI) values of <0.65 microM and >68, respectively.
authors.affiliation: Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai 200032, People's Republic of China.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.forename: Nicole
authors.initials: N
authors.lastname: Kilgore
authors.forename: Kuo-Hsiung
authors.initials: KH
authors.lastname: Lee
authors.forename: Dao-Feng
authors.initials: DF
authors.lastname: Chen
mesh_terms: D019380:Anti-HIV Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D005638:Fruit / Q000737:chemistry; D020128:Inhibitory Concentration 50; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D032141:Schisandra / Q000737:chemistry*
chemical_list: D019380:Anti-HIV Agents; D004365:Drugs, Chinese Herbal; D017705:Lignans; C516503:rubrisandrin A; C516504:rubrisandrin B