title: Ethyl (6aRS,8RS,12bRS)-6-oxo-8-phenyl-6a,7,8,12b-tetrahydro-6H-benzo[b]naphtho[1,2-d]pyran-6a-carboxylate.
abstract: In the title compound, C(26)H(22)O(4), the pyranone ring adopts a twisted boat conformation, while the cyclohexane ring is close to an envelope conformation. The dihedral angle between the mean planes of the coumarin and naphthalene systems is 78.8(1) degree. The attached phenyl ring is in an equatorial position with respect to the cyclohexane ring.
authors.affiliation: X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Anwar
authors.initials: A
authors.lastname: Usman
authors.forename: Ibrahim Abdul
authors.initials: IA
authors.lastname: Razak
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Suchada
authors.initials: S
authors.lastname: Chantrapromma
authors.forename: Bao-Guo
authors.initials: BG
authors.lastname: Zhao
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Xu
mesh_terms: D003374:Coumarins / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D009281:Naphthalenes / Q000737:chemistry*
chemical_list: D003374:Coumarins; D009281:Naphthalenes; C454601:ethyl 6-oxo-8-phenyl-6a,7,8,12b-tetrahydro-6H-benzo(b)naphtho(1,2-d)pyran-6a-carboxylate