The title compound, C(18)H(28)O(4), crystallizes with two mol-ecules in the asymmetric unit. Both mol-ecules have similar conformations of nine-membered rings, which are trans-fused with cyclo-butane fragments. The puckering amplitudes (q2) of the cyclo-butane rings are 0.2451 (2) and 0.2526 (2) Å.