1‐Isopropyl‐6,6,8a‐trimethyl‐1,3a,5,6,7,8a‐hexahydro‐3 H ‐1‐benzofuro[2,3‐ b ]pyrrole‐2,4‐dione

The crystal structure of the title benzofuran derivative, C 16 H 23 NO 3 , has been elucidated. The tricyclic core, i.e. the tetrahydrobenzo–dihydrofuro–pyrrolidine ring system, is non‐planar owing to the folding of the five‐membered rings at their cis junction. The cyclohexene ring assumes a half‐chair conformation, while the dihydrofuran and pyrrolidine rings each adopt an envelope conformation. Intramolecular C—H⋯O hydrogen bonds form S (6) closed patterns.