title: rac-4a,10b-cis,10b,5c-trans-5-(7-Methyl-2-oxo-2H-chromen-4-yl)-3,4,4a,5,6,10b-hexa-hydro-2H-pyrano[3,2-c]quinoline.
abstract: In the racemic title compound, C(22)H(21)NO(3), the nitro-gen-containing ring of the pyran-oquinoline moiety adopts a slightly distorted half-chair conformation and the oxygen-containing ring adopts a slightly distorted chair conformation. The benzene rings make a dihedral angle of 84.97 (8)°. In the crystal, weak C-H⋯O inter-actions link the mol-ecules into chains extending along the a-axis direction.
authors: Department of Physics, Kunthavai Naachiar Government Arts College (W) (Autonomous), Thanjavur-7,  India.
authors: M
authors: M
authors: Kayalvizhi
authors: G
authors: G
authors: Vasuki
authors: Shriniwas D
authors: SD
authors: Samant
authors: Kailas K
authors: KK
authors: Sanap