The crystal structure of 3, 3-diphenylnaphtho[1, 2-c]furan-1(3H)-one 2 was determined by X-ray diffraction analysis. It possesses P2(1)2(1)2(1) (#19) space group symmetry, with a = 11.922(2), b = 17.142(4), c = 8.429(2) Angstrom, and D-calc = 1.297 mg/m(3) for Z = 4.