9-(2-Chloro-phen-yl)-4a-hy-droxy-3,4,4a,5,6,7,9,9a-octa-hydro-2H-xanthene-1,8-dione.
In the title compound, C19H19ClO4, the di-hydro-pyran ring and the cyclo-hexane ring adopt a half-chair conformation and a chair conformation, respectively. The cyclo-hexene ring has an envelope conformation with the central CH2 C atom as the flap. This atom is disordered over two positions [site-occupancy ratio = 0.744 (12):0.256 (12)] above and below the mean plane formed by the other five atoms. In the crystal, O-H⋯O hydrogen bonds between hy-droxy and carbonyl groups link mol-ecules into chains propagating along [001].
Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China.
Qiu-Ling
QL
Liu
Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China.
Xin-Yan
XY
Wu
Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China.
Feng
F
Gao
Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China.
Dan
D
Bao
Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China.
Fang-Ming
FM
Wang