(3aR,4S,7R,7aS)-2-Phenyl-4-propyl-3a,4,7,7a-tetrahydro-1H-4,7-epithioisoindole-1,3-dione 8-oxide

In the tetrahydroisoindole moiety of the title compound, C17H17NO3S, the six-membered ring assumes a boat configuration and the –S=O group bridges the prow and stern of the boat. The phenyl ring is oriented at a dihedral angle of 83.2 (1)° with respect to the pyrrole ring. In the crystal, intermolecular C—H...O hydrogen bonds link the molecules into a three-dimensional network. A weak C—H...π interaction involving the phenyl ring is also found. The crystal studied was an inversion twin.