[5-(2-Ethylaminomethyl-4-trifluoromethyl-phenyl)-pyridin-3-yl]-acetic acid ethyl ester, dihydrochloride   、                                                                                      
2-甲酸吡嗪                                                                                                                                                                                                                                                                                                          以to provide [5-(2-{[N-ethyl-N-(pyrazine-2-carbonyl)-amino]-methyl}-4-trifluoromethyl-phenyl)-pyridin-3-yl]-acetic acid ethyl ester的产率得到[5-(2-{[N-ethyl-N-(pyrazine-2-carbonyl)-amino]-methyl}-4-trifluoromethyl-phenyl)-pyridin-3-yl]-acetic acid ethyl ester