Acta Cryst. (2006). E62, o1759-o1761  [ doi:10.1107/S1600536806011494 ]

Diethyl 3,3'-(cis-[4a]-cisoid-[4a,4b]-cis-[4b]-9,11-dimethyl-2,4,6,8-tetraoxoperhydrocyclobuta[1,2-d:3,4-d]dipyrimidine-1,5-diyl)dipropionate

W.-J. Tang and Q.-H. Song

Abstract: In the title compound, C₂₀H₂₈N₄O₈, the two methyl groups attached to the cyclobutane ring are cis oriented. The crystal structure is stabilized by intermolecular N-HO hydrogen bonds.

Online 7 April 2006

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