8-O-Acetyl-8-epi-9-de­oxygoniopypyrone

The title compound (systematic name: 7-oxo-3-phenyl-2,6-dioxabicyclo­[3.3.1]nonan-4-yl acetate), C(15)H(16)O(5), is a styryllactone derivative which was isolated from Goniothalamus macrophyllus. The mol­ecule has two fused rings consisting of a tetra­hydro-2H-pyran and a lactone ring, with the benzene ring and the acetyl group attached to the tetra­hydro-2H-pyran ring. The tetra­hydro-2H-pyran ring is in a standard chair conformation, whereas the lactone ring is in an envelope conformation. In the crystal, mol­ecules are linked by weak C—H⋯O inter­actions into sheets parallel to the ac plane. Weak C—H⋯π inter­actions are also observed.