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In the title compound, C33H38N4O3, the mean planes of the 9H-xanthene unit and spiro­lactam (nine-atom) core are almost mutually perpendicular at 87.26 (6)°. Intra­molecular N—H...O and C—H...N inter­actions influence the 4-oxo­pent-2-en-2-yl­amino conformation. In the crystal, weak C—H...O hydrogen bonds link the mol­ecules into chains along [001].
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