(3aR*,8bR*)-3a,8b-Dihy-droxy-1-(4-methyl-phen-yl)-2-methyl-sulfanyl-3-nitro-1,8b-di-hydro-indeno-[1,2-b]pyrrol-4(3aH)-one.

The asymmetric unit of the title compound, C19H16N2O5S, contains four independent mol-ecules (A, B, C and D), with two mol-ecules (B and D) displaying disorder in their methyl-sulfanyl groups [occupancy ratios of 0.797 (11):0.203 (11) and 0.85 (2):0.15 (2)]. The nitro groups are twisted slightly out of the planes of the 2-pyrroline rings to which they are bonded with dihedral angles of 10.17 (1), 8.01 (1), 9.44 (1) and 8.87 (1)° in mol-ecules A, B, C and D, respectively. The 2-pyrroline rings are almost orthogonal to the attached tolyl rings, forming dihedral angles of 73.44 (1), 81.21 (1), 88.18 (8) and 73.94 (1)° for mol-ecules A, B, C and D, respectively. A weak intra-molecular O-H⋯O inter-action is observed in mol-ecules B and C. The two hy-droxy groups in each mol-ecule are involved in inter-molecular O-H⋯O hydrogen bonding. In the crystal, mol-ecules are connected via O-H⋯O and C-H⋯O hydrogen bonds, forming a complex three-dimensional network.

(3aR,8bR)-3a,8b-Dihy-droxy-2-methyl-sulfanyl-3-nitro-1-phenyl-1,8b-di-hydro-indeno[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) Šfrom the other atoms. The cyclo-pentane 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 mol-ecular structure features a weak intra-molecular O-H⋯O bond and a possible C-H⋯π inter-action. In the crystal, the mol-ecules 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-Dihy-droxy-1-(4-meth-oxy-phen-yl)-2-methyl-sulfan-yl-3-nitro-1,8b-di-hydro-indeno-[1,2-b]pyrrol-4(3aH)-one.

In the title compound, C19H16N2O6S, the pyrrolidine ring adopts a twisted conformation with puckering parameters q 2 = 0.088 (3) Šand Φ2 = 61.5 (14)°. The cyclo-pentane ring adopts a twisted conformation with puckering parameters q 2 = 0.099 (2) Šand Φ2 = 242.8 (14)°. A weak intra-molecular O-H⋯O inter-action occurs. In the crystal, pairs of C-H⋯O inter-actions generate dimers with graph-set motif R 2 (2)(24) and they are interconnected by pairs of O-H⋯O hydrogen bonds, which link the mol-ecules into inversion dimers with graph-set motif R 2 (2)(10).