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Tetra-methyl 1,4-dimethyl-13,14-dioxa-penta-cyclo-[8.2.1.1(4,7).0(2,9).0(3,8)]tetra-deca-5,11-diene-5,6,11,12-tetra-carboxyl-ate



Tetra-methyl 1,4-dimethyl-13,14-dioxa-penta-cyclo-[8.2.1.1(4,7).0(2,9).0(3,8)]tetra-deca-5,11-diene-5,6,11,12-tetra-carboxyl-ate



Acta Crystallographica. Section E, Structure Reports Online 68(Pt 10): O2961-O2961



In the title compound, C(22)H(24)O(14), the relative stereochemistry at the cyclo-butane ring is cis-anti-cis and the methyl groups in the bicyclic rings are syn to each other. The two carboxyl-ate groups attached to the same -C=C- bond are disordered over two sets of sites in a 0.603 (2):0.397 (2) ratio. In the crystal, weak C-H⋯O hydrogen bonds connect mol-ecules into C(12) chains along [001] incorporating R(2) (2) (2)(10) rings.

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Accession: 056154039

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PMID: 23125743

DOI: 10.1107/S1600536812039219



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