1,1-dimethylethyl {(3R,4S)-1-[(3-fluoro-8-oxo-5,6-dihydro-4H,8H-pyrido[3,2,1-de]-1,5-naphthyridin-6-yl)methyl]-3-hydroxy-4-piperidinyl}carbamate   、                                                                                      
三氟乙酸                                                                                                                                                              在
                                                                                                                                                                                 
甲醇   、                                                                                                  resin                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 19.0h,
                                                                                                                以to give the title compound as a white solid (0.386 g)的产率得到6-{[(3R,4S)-4-amino-3-hydroxy-1-piperidinyl]methyl}-3-fluoro-5,6-dihydro-4H,8H-pyrido[3,2,1-de]-1,5-naphthyridin-8-one trifluoroacetate