%0 Journal Article
%T Tetramethyl 1,4-dimethyl-13,14-dioxapentacyclo[8.2.1.14,7.02,9.03,8]tetradeca-5,11-diene-5,6,11,12-tetracarboxylate
%A Alan J. Lough
%A Kelsey Jack
%A William Tam
%J Acta Crystallographica Section E
%D 2012
%I International Union of Crystallography
%R 10.1107/s1600536812039219
%X In the title compound, C22H24O14, the relative stereochemistry at the cyclobutane ring is cis-anti-cis and the methyl groups in the bicyclic rings are syn to each other. The two carboxylate groups attached to the same ¡ªC=C¡ª bond are disordered over two sets of sites in a 0.603 (2):0.397 (2) ratio. In the crystal, weak C¡ªH...O hydrogen bonds connect molecules into C(12) chains along [001] incorporating R222(10) rings.
%U http://scripts.iucr.org/cgi-bin/paper?S1600536812039219