methyl (+/-)-4-[4-[2-[6-(methylamino)pyridin-2-yl]-1-ethoxy]phenyl]-3-(2-phenylethyl)butanoate   、                                                                                      Ethyl (+/-)-3-phenyl-4-[4-[2-[6-(methylamino)pyridin-2-yl]-1-ethoxy]pheny]butanoate                                                                                                                                                                                                                                                                                                          以the title compound (70%) was obtained as a white foam的产率得到(+/-)-4-[4-[2-[6-(methylamino)pyridin-2-yl]-1-ethoxy]phenyl]-3-(2-phenylethyl)butanoic acid