C22H20O4, orthorhombic, P2(1)2(1)2(1) (no. 19), a = 11.355(5) angstrom, b = 15.084(7) angstrom, c = 20.078(9) angstrom, V = 3439(3) angstrom(3), Z = 4, R ( gt )(F) = 0.0382, wR ( ref )(F (2)) = 0.0994, T = 296(2) K.