2,4-二氯硝基苯   、                                                                                      
N-(t-butyloxycarbonyl)-4-hydroxy-L-phenylalanine 4-pyridylamide                                                                                                                                                                                              以
                                                                                         
二甲基亚砜                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 N-(t-butyloxycarbonyl)-4-(3-chloro-6-nitrophenoxy)-L-phenylalanine 4-pyridylamide dihydrochloride   、                                                                                             N-(trans-4-aminomethylcyclohexylcarbonyl)-4-(3-chloro-6-nitrophenoxy)-L-phenylalanine 4-pyridylamide dihydrochloride