Title: 7-Chloro-4-(piperazin-1-yl)quinoline.
Journal: Acta crystallographica. Section E, Structure reports online 20120501
Title: 4,7-Dichloro-quinoline.
Journal: Acta crystallographica. Section E, Structure reports online 20120501
Title: Identification of an isomer impurity in piperaquine drug substance.
Journal: Journal of chromatography. A 20061201