N-[2-(6-Methyl-4-oxo-4H-chromen-3-yl)-4-oxothia-zolidin-3-yl]furan-2-carbox-amide N,N-dimethyl-formamide solvate.

The title mol-ecule, C(18)H(14)N(2)O(5)S·C(3)H(7)NO, comprises of a carboxamide group bonded to a furan ring and a distorted envelope-shaped 4-oxothia-zolidin-3-yl group which is connected to a substituted 6-methyl-4-oxo-4H-chromen-3-yl group. Extensive strong N-H⋯O and weak C-H⋯O inter-molecular hydrogen-bonding inter-actions occur between dimethyl-formamide (DMF), the crystallizing solvent, and the various heterocyclic groups within the compound, as well as additional weak C-H⋯O inter-actions between the heterocyclic groups themselves. The carboxyl group of the DMF solvent mol-ecule forms a trifurcated (four-center) acceptor hydrogen-bond inter-action with the carboxamide, furan and 6-methyl-4-oxo-4H-chromen-3-yl groups. The dihedral angles between the planar chromone group [maximum deviation = 0.0377 (18)°] and those of the furan and 4-oxothia-zolidin-3-yl groups are 89.4 (6) and 78.5 (1)°, respectively.