In the title mol-ecule, C(20)H(16)O(4), the two outermost phenyl rings form dihedral angles of 79.80 (7) and 69.35 (7)° with the central benzene ring. In the crystal structure, weak inter-molecular C-H⋯O inter-actions link the mol-ecules into ribbons propagating along [1[Formula: see text]0].