title: 13,13a-Dihydro-13-methoxy-9-methyl-1-benzopyrano[4,3-i]dinaphtho[2, 1-c;1',2'-f]-2,8-dioxabicyclo[3.3.1]nonane.
abstract: The crystal structure of the title compound, C(32)H(24)O(4), contains three fused dihydropyran rings (A, B and C); ring A is fused with a benzene ring while the other two rings, B and C, are fused with naphthalene rings. Ring A adopts a half-chair conformation with an equatorial methoxy group, whereas ring B assumes a distorted half-chair conformation, the A/B ring junction being trans. Ring C adopts a distorted half-boat conformation and is nearly orthogonal to ring B. Ring C is inclined to the best plane of ring A at an angle of 112.1 (1) degrees.
authors: Department of Chemistry, University of Calcutta, 92 Acharya Prafulla Chandra Road, Calcutta 700 009, India.
authors: S
authors: S
authors: Sahana
authors: C
authors: C
authors: Bandyopadhyay
authors: S
authors: S
authors: Chaudhuri
mesh_terms: D018360:Crystallography, X-Ray; D019428:HIV Integrase Inhibitors / Q000737:chemistry*; D006576:Heterocyclic Compounds, 4 or More Rings / Q000737:chemistry*; D006860:Hydrogen Bonding; D015394:Molecular Structure
chemical_list: C420700:13,13a-dihydro-13-methoxy-9-methyl-1-benzopyrano(4,3-i)dinaphtho(2,1-c 1',2'-f)-2,8-dioxabicyclo(3.3.1)nonane; D019428:HIV Integrase Inhibitors; D006576:Heterocyclic Compounds, 4 or More Rings