Two new lignans from the fruits of Schisandra sphenanthera.

Natural product communications

PubMedID: 19967993

Wang CR, Sun R, Yanga CR, Chen YG, Song HC. Two new lignans from the fruits of Schisandra sphenanthera. Nat Prod Commun. 2009;4(11):1571-4.
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.