In the title compound, C25H28O3, the cyclopentane ring adopts a half-chair
conformation, with one of the side chains attached in the equatorial positi
on and the other in a hi-axial orientation. The mean plane through the cycl
opentane ring forms dihedral angles of 30.9 (2) and 24.3 (2)degrees with th
e two phenyl rings. The crystal structure is stabilized by C-H ... O hydrog
en bonds and CH ...pi interactions.