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Miller, Christopher P.; Collini, Michael D.; Morris, Robert L.; Singhaus, Robert R. Preparation of tetracyclic compounds as estrogen ligands.
U.S. Pat. Appl. Publ. (2006), 33 pp. CODEN: USXXCO US 2006004087 A1 20060105 CAN 144:108195 AN 2006:11300 CAPLUS