1H-​Pyrazole-​1-​butanoic acid, 5-​(4-​bromophenyl)​-​3-​(1,​2-​dihydro-​6-​methyl-​2-​oxo-​4-​phenyl-​3-​quinolinyl)​-​4,​5-​dihydro-​γ-​oxo-