Title: Ethyl 8-chloro-1-cyclo-propyl-6,7-difluoro-4-oxo-1,4-dihydro-quinoline-3-carboxyl-ate.
Journal: Acta crystallographica. Section E, Structure reports online 20111101
Title: Ethyl 1-cyclo-propyl-6,7-difluoro-8-meth-oxy-4-oxo-1,4-dihydro-quinoline-3-carboxyl-ate.
Journal: Acta crystallographica. Section E, Structure reports online 20081101