2-Oxo-2-(2-oxo-2H-chromen-3-yl)ethyl pyrrolidine-1-carbodi­thio­ate

There are two independent mol­ecules in the asymmetric unit of the title compound, C(16)H(15)NO(3)S(2), in which the pyrrolidine rings adopt envelope conformations, with a methyl­ene C atom as the flap. The dihedral angles betweeen the near-planar 2H-chromene ring systems [maximum deviations = 0.0167 (20) and 0.0136 (19) Å] and the pyrrolidine rings (all atoms) are 83.83 (11) and 82.43 (11)°. In the crystal, inversion dimers linked by pairs of C—H⋯O hydrogen bonds occur for one of the mol­ecules. Further C—H⋯O links involving both mol­ecules generate a three-dimensional network.