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Acta Cryst. (2013). E69, o993
[ doi:10.1107/S1600536813014062 ]

6a-Nitro-6-phenyl-6,6a,6b,7,8,9,10,12a-octahydrospiro[chromeno[3,4-a]indolizine-12,3'-indolin]-2'-one

S. K. Devi, T. Srinivasan, J. N. S. Rao, R. Raghunathan and D. Velmurugan

Abstract: In the title compound, C28H25N3O4, the central pyrrolidine ring adopts adopts an envelope conformation with the N atom as the flap and the piperidine ring adopts a chair conformation. The pendant pyrrolidine ring is almost planar (r.m.s. deviation = 0.008 Å). An intramolecular C-H...O interaction closes an S(6) ring. In the crystal, inversion dimers linked by pairs of N-H...O hydrogen bonds generate R22(8) loops.


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