organic compounds
The racemic title dipyrrolopyrrolizine compound crystallizes from dimethylformamide as a disolvate, C55H39Cl2N7O6·2C3H7NO. None of the four fused heterocyclic rings is planar; one adopts an envelope conformation, two others adopt half-chair conformations and the fourth adopts a conformation intermediate between an envelope and a half-chair. The arrangement of the ring fusions is such as to preclude the possibility of internal mirror symmetry. The three independent molecular components are weakly linked by C-HO hydrogen bonds, and the dipyrrolopyrrolizine molecules are linked by a combination of four C-HO and one C-H(arene) hydrogen bond to form a three-dimensional framework, from which the dimethylformamide solvent molecules are pendent. However, aromatic - stacking interactions are absent in the structure.