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Two new lignans from the fruits of Schisandra sphenanthera
Chun Ren Wang1, Rong Sun, Chen Ren Ou Yanga
1Provincial Key Lab of Rural Energy Engineering, Yunnan Normal University, Kunming 650092, People's Republic of China.
Abstract:
Two new lignans, (8R,8'R)-8- hydroxy-3,4-dimethoxy-3',4'-methylenedioxy-7-oxolignan (1) and (7'R,8'S)-3,4-methylenedioxy-3',4'-dimethoxy -7,8-seco-7,7'-epoxylignan-7,8-dione (2), were isolated from the EtOAc extract of the fruits of Schisandra sphenanthera, along with ten known compounds. The structures of these compounds were elucidated on the basis of NMR and MS analysis. This is the first report of the occurrence of secolignans in Schisandra.