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In the crystal structure of the title compound, C 21 H 17 NO 3 , the dibenzo–isoquinoline–dione unit has a planar structure, the maximum atomic deviation being 0.091 (3) Å. The crystal structure is stabilized by π–π stacking [centroid–centroid distance = 3.851 (2) Å] and inter­molecular N—H⋯O hydrogen bonding.

7-Pivaloyl-5,6-dihydro-4H-naphtho[3,2,1-de]isoquinoline-4,6-dione