title: 9-[(E)-2-(2-Meth-oxy-phen-yl)ethen-yl]-3,4,5,6,7,9-hexa-hydro-2H-xanthene-1,8-dione.
abstract: In the title compound, C(22)H(22)O(4), the two cyclo-hexenone rings adopt half-chair conformations, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms by 0.142 (2) and 0.287 (2)Å, respectively. In the crystal, weak C-H⋯O hydrogen bonds link mol-ecules into chains running parallel to the a axis.
authors.forename: Joo Hwan
authors.initials: JH
authors.lastname: Cha
authors.forename: Ae Nim
authors.initials: AN
authors.lastname: Pae
authors.forename: Jae Kyun
authors.initials: JK
authors.lastname: Lee
authors.forename: Yong Seo
authors.initials: YS
authors.lastname: Cho