1-Acetyl-7a′-phenylspiro­[3H-indole-3,2′(2a′H)-oxeto­[2,3-b]­benzo­furan]-2(1H)-one

In the title compound, C₂₄H₁₇NO₄, the oxetane ring deviates from planarity. The benzo­furan and indole moieties are in synclinal configurations, and the attached phenyl ring forms a dihedral angle of 68.0 (2)° with respect to the oxetane ring. Intramolecular C—H⋯O interactions stabilize the molecular structure.