In the title compound, C17H21NO2. the central pyridine ring is almost plana
r and the outer rings are half-chairs. The O atoms of the keto groups devia
te significantly from the mean plane passing through their corresponding ri
ngs. The molecule contains a pseudo-mirror plane which passes through the c
entral N and C atoms and the molecule is slightly folded along an axis pass
ing through the same atoms. The dihedral angle between the outer rings is 6
.5(2)degrees. The packing is stabilized by an intermolecular C-H ... O hydr
ogen bond.