Acta Cryst. (2003). E59, o919-o921  [ doi:10.1107/S1600536803012327 ]

10-Hydroxy-9-methoxy-5,6,13,13a-tetrahydro[1,3]dioxolo[4,5-g]isoquino[3,2-a]isoquinolin-8-one

T. Aree, B. Singhana, C. Pakawatchai, W. Chavasiri and U. Kokpol

Abstract: In the title compound, 8-oxotetrahydrothalifendine, C₁₉H₁₇NO₅, the dihydropyrido and pyrido moieties adopt the intermediate conformations of envelope-screw-boat and envelope-twist, respectively. The dihedral angle between the two benzene rings is 37.16  (8)°. In the crystal structure, the molecules translated by a unit along the c axis are linked by three weak C-HO intermolecular interactions to form a molecular chain. Along the a axis, the adjacent chains related by screw symmetry are connected by a strong O-HO and a weak C-HO intermolecular interaction to form layers parallel to the bc plane.

Online 17 June 2003

Copyright © International Union of Crystallography
IUCr Webmaster