title: 2-Amino-4'-bromo-2',5-dioxo-4H,5H-pyrano[3,2-c]chromene-4-spiro-3'(2'H)-1'H-indole-3-carbonitrile N,N-dimethyl-formamide solvate.
abstract: In the mol-ecule of the title compound, C(20)H(10)BrN(3)O(4)·C(3)H(7)NO, the spiro pyran ring adopts a twist conformation. The indole and coumarin ring systems are each nearly planar, and are oriented at a dihedral angle of 79.29 (3)°. In the crystal structure, inter-molecular N-H⋯O, N-H⋯N, C-H⋯O and C-H⋯N hydrogen bonds link the mol-ecules.
authors.affiliation: Department of Chemistry, Xuzhou Medical College, Xuzhou 221002, People's Republic of China.
authors.forename: Song-Lei
authors.initials: SL
authors.lastname: Zhu