( E )-3-Thia-1,5(1,3)-dibenzena-cyclo-undeca-phan-8-ene-6,11-dione 3,3-dioxide.

The molecular structure of the title cyclophane, C 20 H 18 O 4 S, has two benzyl groups, a sulfone group, and two carbonyl groups adjacent to a double bond. The phenyl rings do not show intra-molecular stacking.