(E)-16-(4-Chloro­benzyl­idene)estrone

In the title compound, C₂₅H₂₅ClO₂, the C ring adopts a chair conformation, while the B ring approximates a half-chair conformation. The five-membered ring D has a twist con­form­ation on the C—C bond fused with the C ring. Aromatic rings A and E are not coplanar, as evidenced by the dihedral angle of 7.51 (1)°. In the crystal, O—H...O hydrogen bonds form a double chain along the ab plane inter­connected by C—H...O inter­actions.

(3aR,8bR)-3a,8b-Dihy­droxy-2-methyl­sulfanyl-3-nitro-1-phenyl-1,8b-di­hydro­indeno[1,2-b]pyrrol-4(3aH)-one

In the title compound, C₁₈H₁₄N₂O₅, the pyrrolidine ring adopts a shallow envelope conformation, with the C atom bearing the OH group (and remote from the N atom) displaced by 0.257 (2) Å from the other atoms. The cyclo­pentane ring has a twisted conformation about the C—C bond bearing one =O and one —OH grouping. The dihedral angle between the five-membered rings (all atoms) is 65.54 (9)° and the OH groups lie to the same side of the ring-junction. The mol­ecular structure features a weak intra­molecular O—H...O bond and a possible C—H...π inter­action. In the crystal, the mol­ecules are linked into [010] chains by O—H...O hydrogen bonds. Weak C—H...O bonds connect the chains into (100) sheets.

(3aR,8bR)-3a,8b-Dihy­droxy-1-(4-meth­oxy­phen­yl)-2-methyl­sulfan­yl-3-nitro-1,8b-di­hydro­indeno­[1,2-b]pyrrol-4(3aH)-one

In the title compound, C₁₉H₁₆N₂O₆S, the pyrrolidine ring adopts a twisted conformation with puckering parameters q₂ = 0.088 (3) Å and Φ₂ = 61.5 (14)°. The cyclo­pentane ring adopts a twisted conformation with puckering parameters q₂ = 0.099 (2) Å and Φ₂ = 242.8 (14)°. A weak intra­molecular O—H...O inter­action occurs. In the crystal, pairs of C—H...O inter­actions generate dimers with graph-set motif R₂²(24) and they are interconnected by pairs of O—H...O hydrogen bonds, which link the mol­ecules into inversion dimers with graph-set motif R₂²(10).