title: 2,2'-(1,3,5,7-Tetra-oxo-1,2,3,5,6,7-hexa-hydro-pyrrolo[3,4-f]isoindole-2,6-di-yl)diacetic acid N,N-dimethyl-formamide disolvate.
abstract: The asymmetric unit of the title compound, C(14)H(8)N(2)O(8)·2C(3)H(7)NO or L·2DMF (DMF = N,N-dimethyl-formamide), contains one half of the centrosymmetric mol-ecule L and one solvent mol-ecule, which is disordered between two orientations in a 0.555 (4):0.445 (4) ratio. Inter-molecular O-H⋯O hydrogen bonds link one L and two DMF mol-ecules into a centrosymmetric hydrogen-bonded cluster. The crystal packing is further stabilized by weak inter-molecular C-H⋯O hydrogen bonds.
authors.affiliation: College of Chemistry, Liaoning University, Shenyang 110036, People's Republic of China.
authors.forename: Chunhua
authors.initials: C
authors.lastname: Ge
authors.forename: Xiangqian
authors.initials: X
authors.lastname: Li
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang