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Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.004 Å; R factor = 0.059; wR factor = 0.180; data-to-parameter ratio = 17.6.In the racemic title compound, C 21 H 18 O 4 , the chromone ring is essentially planar [maximum deviation from the least-squares plane = 0.026 (3) Å ], with a dihedral angle of 78.18 (12) between the benzene rings of the chromanone and chromenone moieties. In the crystal, there are weak -stacking interactions [minimum ring centroid separation = 3.9286 (17) Å ]. Related literature