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

Wen-Jian Tang, Qin-Hua Song
2006 Acta Crystallographica Section E  
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—H...O hydrogen bonds.
doi:10.1107/s1600536806011494 fatcat:kjrzt3d6ozfnrkvxvhfh6skoa4