Studies on chemical constituents of Schisandra propinqua (Wall.) Hook. f. et Thoms

Objective:To isolate and characterize compounds from the stems of Schisandra propinqua .Method:Extracting with solvent, isolating by column chromatography and identifiing by the spectroscopic methods.Result:Six dibenzocyclooctadiene lignans were isolated and identified as tigloylgomisin P(1), angeloylgomisin O(2), angeloylisogomisin O(3), kadsulignan L(4), (±)5,8 epoxyl 6,7 dimethyl 2′,3′,2″,3″ dimethylenedioxy 4′,1″ dimethyl 1,2∶3,4 dibenzo 1,3 cyclooctadiene(5)and wuweizisu C(6).Conclusion:Compounds 4 and 5 were the first two dibenzocyclooctadiene lignans with an 6,9 epoxy bridge cycle discovered in the genus Schisandra . The others were originally isolated from S. propinqua .