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

In the title compound, C 19 H 16 N 2 O 6 S, the pyrrolidine ring adopts a twisted conformation with puckering parameters q 2 = 0.088 (3) Å and Φ 2 = 61.5 (14)°. The cyclopentane ring adopts a twisted conformation with puckering parameters q 2 = 0.099 (2) Å and Φ 2 = 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 R 2 2 (24) and they are interconnected by pairs of O—H...O hydrogen bonds, which link the molecules into inversion dimers with graph-set motif R 2 2 (10).