Photodegradation of sparfloxacin and isolation of its degradation products by preparative HPLC - Salgado, Hérida Regina Nunes; Moreno, Paulo Roberto Hrihorowitsch; Braga, A. L.; Schapoval, Elfrides Eva Scherman (Revista de Ciências Farmacêuticas Básica e Aplicada, 2005)