title: 3,3,6,6-Tetra-methyl-9-phenyl-3,4,5,6-tetra-hydro-9H-xanthene-1,8(2H,7H)-dione.
abstract: In the title compound, C(23)H(26)O(3), the three six-membered rings of the xanthene system are non-planar, having total puckering amplitudes, Q(T), of 0.443 (2), 0.202 (2) and 0.449 (2) Å. The central ring adopts a boat conformation and the outer rings adopt sofa conformations. The crystal structure is stabilized by van der Waals inter-actions.
authors.forename: B Palakshi
authors.initials: BP
authors.lastname: Reddy
authors.forename: V
authors.initials: V
authors.lastname: Vijayakumar
authors.forename: T
authors.initials: T
authors.lastname: Narasimhamurthy
authors.forename: J
authors.initials: J
authors.lastname: Suresh
authors.forename: P L Nilantha
authors.initials: PL
authors.lastname: Lakshman