title: Isolation and structural elucidation of urinary metabolites of ciprofloxacin.
abstract: After oral administration of 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-piperazine-1-ylquinoline++ +-3-carboxylic acid (ciprofloxacin, Bay o 9867; designated trademark: Ciprobay) four metabolites M1-M4 were isolated from human urine by Craig counter current distribution and semipreparative high-performance liquid chromatography. Their molecular structures were elucidated by nuclear magnetic resonance and mass spectrometry and confirmed by comparing their spectra with those of authentic synthetic reference compounds.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D002851:Chromatography, High Pressure Liquid; D002939:Ciprofloxacin / Q000008:administration & dosage / Q000302:isolation & purification / Q000378:metabolism* / Q000652:urine; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D013058:Mass Spectrometry; D008875:Middle Aged
chemical_list: D002939:Ciprofloxacin