The title mol-ecule, C19H24O5, is built by annulation of a half-chair cyclo-hexenone and a twist-cyclo-hexenone to a flat 4-H-pyrane boat. In the crystal, mol-ecules are connected via van der Waals inter-actions and C-H⋯O hydrogen bonds.
Keywords: crystal structure; heterocycles; polycyclic system.
© Detert et al. 2020.