title: Methyl 6'-amino-5'-cyano-2'-methyl-2-oxospiro-[indoline-3,4'-pyran]-3'-carboxyl-ate.
abstract: In the mol-ecule of the title compound, C(16)H(13)N(3)O(4), the atoms of the spiro pyran ring are nearly planar with a maximum deviation of 0.095 (2) Å. The indole and pyran rings are oriented at a dihedral angle of 87.3 (9)°. In the crystal, mol-ecules are linked by inter-molecular N-H⋯N and N-H⋯O hydrogen bonds.
authors.affiliation: Department of Chemistry, Xuzhou Medical College, Xuzhou 221004, People's Republic of China.
authors.forename: Song-Lei
authors.initials: SL
authors.lastname: Zhu
authors.forename: Ting
authors.initials: T
authors.lastname: Liu