title: Ethyl (4aR*,7S*,8S*,8aS*)-1-oxo-7-phenyl-3,4,4a,7,8,8a-hexa-hydro-1H-isochromene-8-carboxyl-ate.
abstract: In the title compound, C(18)H(20)O(4), both the tetra-hydro-pyran-one ring and the cyclo-hexene ring adopt envelope conformations. The crystal packing is stabilized by weak inter-molecular C-H⋯O hydrogen bonding.
authors.affiliation: Laboratory of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China.
authors.forename: Xiu Qing
authors.initials: XQ
authors.lastname: Jiang
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Wu