7′-(4-Methoxy­phen­yl)chroman-3-spiro-6′-hexa­hydro-1H-pyrrolo[1,2-c]thia­zole-5′-spiro-3′′-1′′H-indole-4,2′′(3′′H)-dione

In the title compound, C₂₈H₂₄N₂O₄S, the indole ring system is planar, but the pyrrolidine and thia­zole rings adopt an envelope and a twist conformation, respectively. The indole system makes a dihedral angle of 55.7 (1)° with the methoxy­phen­yl ring. The mol­ecular packing in the crystal structure is stabilized by C—H...O and N—H...O hydrogen bonds.

Eth­yl 2,2′′-dioxo-2′,3′,5′,6′,7′,7a′-hexa­hydro­acenaphthene-1-spiro-3′-1′H-pyrrolizine-2′spiro-1′′-acenaphthene-1-carboxyl­ate

In the title compound, C₃₂H₂₅NO₄, the mean plane through the pyrrolizidine system is almost perpendicular [dihedral angle 88.9 (1)°] to that through one of the acenaphthene units, and the dihedral angle between the pyrrolizidine and the second acenaphthene system is 81.6 (1)°. In the pyrrolizidine system, one of the rings is in a half-chair conformation while the other is in an envelope conformation. The overall conformation is twisted about the fusion bond. The crystal structure is stabilized by a C—H...O inter­molecular hydrogen bond.