Michael J Lovdahl, Stephen R. Priebe
Aug 15, 2000
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0
Influential Citations
27
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Journal
Journal of pharmaceutical and biomedical analysis
Abstract
Exposure of clinafloxacin to light results in photochemical degradation. The polar and nonpolar photodegradation products were profiled by HPLC using two sets of conditions. Clinafloxacin was subjected to severe light exposure conditions to obtain elevated levels of the photodegradation products for characterization. The structures of eight new degradation products were elucidated based on information from LC-MS/MS fragmentation and NMR spectra following isolation by preparative HPLC. Two photodegradation routes were identified: (1) dechlorination, followed by further reactions involving the quinolone ring, to yield polar photodegradation products; and (2) degradation of the pyrrolidine side-chain, yielding the nonpolar photodegradation products.