The reaction of 5,6-(2,2-dimethylchromanyl)-2-hydroxy-4-methoxyacetophenone and 3,4-bis(methoxymethyloxy)benzaldehyde affords the intense orange title chalcone derivative, C25H30O8. The two benzene rings are connected through a &#8212;C(=O)&#8212;CH=CH&#8212; (propenone) unit, which is in an E conformation; the ring with the hydroxy substitutent is aligned at 19.5&#8197;(2)&#176; with respect to this unit, whereas the ring with the methoxymethyloxy substituent is aligned at 9.3&#8197;(3)&#176;. The dihedral angle between the rings is 19.38&#8197;(10)&#176;. The hydroxy group engages in an intramolecular O&#8212;H...O hydrogen bond with the carbonyl O atom of the propenone unit, generating an S(5) ring
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