title: 8-O-Acetyl-8-epi-9-de-oxygoniopypyrone.
abstract: 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 mol-ecule has two fused rings consisting of a tetra-hydro-2H-pyran and a lactone ring, with the benzene ring and the acetyl group attached to the tetra-hydro-2H-pyran ring. The tetra-hydro-2H-pyran ring is in a standard chair conformation, whereas the lactone ring is in an envelope conformation. In the crystal, mol-ecules are linked by weak C-H⋯O inter-actions into sheets parallel to the ac plane. Weak C-H⋯π inter-actions are also observed.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Suchada
authors.initials: S
authors.lastname: Chantrapromma
authors.forename: Uma
authors.initials: U
authors.lastname: Prawat
authors.forename: Nawong
authors.initials: N
authors.lastname: Boonnak
authors.forename: Ibrahim Abdul
authors.initials: IA
authors.lastname: Razak