(8-Benzoyl-2,7-dieth-oxy-naphthalen-1-yl)(phen-yl)methanone.

In the title compound, C28H24O4, the benzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost anti-parallel, and the benzene rings make a dihedral angle of 20.03 (7)°. The dihedral angles between the benzene rings and the naphthalene ring system are 68.

(3,6-Dimeth-oxy-naphthalen-2-yl)(naphthalen-2-yl)methanone.

In the title compound, C(23)H(18)O(3), the dihedral angle between the two naphthalene ring systems is 78.02 (3)°. The bridging carbonyl C-C(=O)-C plane makes a dihedral angle of 70.