Citation: Ying MA, Gui Qiu HAN, Tian Yi JIANG, Xian Bin YANG. NEOLIGNANS FROM PIPER KADSURA (Ⅱ)[J]. Chinese Chemical Letters, ;1992, 3(8): 635-636. shu

NEOLIGNANS FROM PIPER KADSURA (Ⅱ)

National Laboratories of Natural and Biomemtic Drugs, Beijing Medical University, Beijing 100083

Received Date: 20 March 1992

Two new bicyclo[3,2,1] octanoid neolignans,named as kadsurenin I and kadsurenin J were isolated from Piper kadsura (Choiey) Ohwi.Based on the spectros-copic analysis (UV,IR,MS and NMR) and chemical derivatization,their structures were established as 7R,8R,1'R,2'S,3'R-Δ^s'-3,4,5'-trimethoxy-2'-hydroxy-1',2',3',4'-tetrahydro-4'-oxo-7.3',8.1'-neolignan and 7R,8R,1'R,2'S,3'R-Δ^s'-3,4,5'-trimethoxy-2'-acetoxy-1',2',3',4'-tetrabydro-4'-oxo-7.3',8.1'-neolignan respectively.
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