9-(2-Chloro-phen-yl)-4a-hy-droxy-3,4,4a,5,6,7,9,9a-octa-hydro-2H-xanthene-1,8-dione.

9-(2-Chloro-phen-yl)-4a-hy-droxy-3,4,4a,5,6,7,9,9a-octa-hydro-2H-xanthene-1,8-dione.