Ethyl (6aRS,8RS,12bRS)-6-oxo-8-phenyl-6a,7,8,12b-tetrahydro-6H-benzo[b]naphtho[1,2-d]pyran-6a-carboxylate

In the title compound, C(26)H(22)O(4), the pyranone ring adopts a twisted boat conformation, while the cyclohexane ring is close to an envelope conformation. The dihedral angle between the mean planes of the coumarin and naphthalene systems is 78.8(1) degree. The attached phenyl ring is in an equatorial position with respect to the cyclohexane ring.