ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, cilt.70, 2014 (ESCI)
In the title compound, C33H27BrClNO4, the dihydropyridine ring adopts a flattened boat conformation. The molecular conformation is stabilized by an intramolecular O-H center dot center dot center dot O hydrogen bond, with an S(8) ring motif. In the crystal, O-H center dot center dot center dot O, C-H center dot center dot center dot O and C-H center dot center dot center dot Cl hydrogen bonds, and C-H center dot center dot center dot pi interactions link the molecules, forming a three dimensional network. In the acridinedione ring system, the two ring C atoms at the 2-and 3-positions, and the C atom at the 6-position and the atoms of the phenyl ring attached to the C atom at the 6-position are disordered over two sets of sites with occupancy ratios of 0.783 ( 5): 0.217(5) and 0.526 (18): 0.474 (18), respectively.