title: 9-(4-Hy-droxy-3,5-dimeth-oxy-phen-yl)-3,3,6,6-tetra-methyl-3,4,5,6,7,9-hexa-hydro-1H-xanthene-1,8(2H)-dione.
abstract: In the title compound, C(25)H(30)O(6), the two fused cyclo-hexa-none rings have envelope conformations, whereas the central pyran ring is roughly planar [mximum deviation = 0.045 (2) Å]. The pyran and benzene rings are almost perpendicular to each other, making a dihedral angle of 86.32 (2)°. In the crystal, molecules are linked via pairs of O-H⋯O hydrogen bonds, forming inversion dimers.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalai nagar 608 002, Tamil Nadu,  India.
authors.forename: V
authors.initials: V
authors.lastname: Sughanya
authors.forename: N
authors.initials: N
authors.lastname: Sureshbabu