Studies of the constituents of Hua-Zhong-Wu-Wei-Zi (Schisandra sphenanthera Rehd. Et Wils.) – II. The structures of schisantherin A, B, C, D, E and related compounds. - Liu,C-S.; Fang,S-D.; Huang,M-F.; Kao,Y-L.; Hsu,J-S. (Acta Chim Sin, 1976)