Abstract The crystal structure of the title compound, C 21 H 16 O 3, has been determined. The compound crystallizes in triclinic space group P Ī with cell parameters a= 9.2240 (9) Å, b= 9.8050 (8) Å, c= 10.1610 (11) Å, α= 94.749 (6)∘, β= 112.544 (4)∘, γ= 102.145 (6)∘ and Z= 2. The structure exhibits both intra and intermolecular interactions of the type C–H⋅ s O. The intermolecular interaction between the molecules form centrosymmetric dimers.