三氟乙酸   、                                                                                      
7-[(3R,4R)-3,4-Bis-(tert-butoxycarbonyl-methyl-amino)-pyrrolidin-1-yl]-6-fluoro-1-(2-fluoro-phenyl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid                                                                                                                                                                                              以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 7-((3R,4R)-3,4-Bis-methylamino-pyrrolidin-1-yl)-6-fluoro-1-(2-fluoro-phenyl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid; compound with trifluoro-acetic acid