N-((2S)-1-((2-(3-fluoro-4-hydroxyphenyl)[1,3]oxazolo[4,5-c]pyridin-6-yl)oxy)propan-2-yl)acetamide   、                                                                                      
溴丁酮                                                                                                                                                                                                                                                                                                          以in the same manner as in Example 5, the title compound was obtained的产率得到N-((2S)-1-((2-(3-fluoro-4-(2-oxobutoxy)phenyl)[1,3]oxazolo[4,5-c]pyridin-6-yl)oxy)propan-2-yl)acetamide