organic compounds
In the title compound, alternatively called 3′-oxocyclohex-1′-eno-1′,6′:16,17–3-O-methylestra-1,3,5(10),16(16H)-tetraen-3-ol, C23H28O2, the cyclohexenone ring is fused to the five-membered ring through the α position at C16. As a result of the ring annelation, the distance between carbonyl and methoxy O atoms [12.994 (2) Å] is much longer than that in estrones or estradiol. The crystal packing is stabilized by C—HO and C—Hπ hydrogen-bonding interactions.
organic compounds
In the title estrane derivative, C20H23BrO2, the five-membered ring adopts a conformation that is intermediate between twist and envelope. The C atom of the formyl group and the bromo function are in close proximity. Close intermolecular BrBr and BrC contacts are observed in the crystal structure.
organic compounds
In the title compound, C15H18Cl2S2, the molecule has a crystallographic twofold axis. The dihedral angle between the symmetry-related thiophene rings is 85.54 (8)°.