title: 3,3'-(1,3,5,7-Tetra-oxo-2,3,6,7-tetra-hydro-1H,5H-pyrrolo[3,4-f]isoindole-2,6-di-yl)dipropanoic acid N,N-dimethyl-formamide disolvate.
abstract: In the title compound, C(16)H(12)N(2)O(8)·2C(3)H(7)NO, the complete tricyclic compound is generated by a crystallographic centre of symmetry. In the crystal, the tricycle is linked to two adjacent N,N-dimethyl-formamide solvent mol-ecules by O-H⋯O hydrogen bonds.
authors.affiliation: Institute of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China.
authors.forename: Chun-Sheng
authors.initials: CS
authors.lastname: Ling
authors.forename: Xu
authors.initials: X
authors.lastname: Wang
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wu