(3E,5E)-1-Allyl-3,5-bis(4-meth­oxy­benzyl­idene)­piperidin-4-one

The piperidine ring in the title compound, C₂₄H₂₅NO₃, adopts an envelope conformation with the N atom being the flap atom, and each C=C double bond exhibits an E conformation. In the crystal, C—H...O hydrogen bonds link the mol­ecules, forming supramolecular layers that stack along the a axis.