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

Abstract

The title compound (systematic name: 7-oxo-3-phenyl-2,6-dioxabicyclo[3.3.1]nonan-4-yl acetate), C15H16O5, 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.