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In the title compound, C 37 H 34 N 2 O 2 , the pyridinone ring adopts a half-chair conformation. In the octa­hydro­indolizine fused-ring system, the piperidine ring is in a chair conformation and the pyrrole ring is twisted about the N—C(piperidine) bond. The mol­ecular structure features a weak intra­molecular C—H⋯O inter­action.

acta crystallographica. section e

5′′-Benzylidene-1′′-methyl-1′-phenyl-1′,2′,3′,5′,6′,7′,8′,8a'-octahydrodispiro[acenaphthylene-1,3′-indolizine-2′,3′′-piperidine]-2,4′′(1<i>H</i>)-dione

5′′-Benzylidene-1′′-methyl-1′-phenyl-1′,2′,3′,5′,6′,7′,8′,8a'-octahydrodispiro[acenaphthylene-1,3′-indolizine-2′,3′′-piperidine]-2,4′′(1H)-dione