2,4-二硝基苯肼   、                                                                                      
(S)-N-{(S)-1-[(S)-1-[(S)-1-((S)-5-Amino-1-carbamoyl-pentylcarbamoyl)-3-carbamoyl-propylcarbamoyl]-2-(1H-indol-3-yl)-ethylcarbamoyl]-3-methyl-butyl}-3-((S)-2-amino-5-oxo-pentanoylamino)-succinamic acid                                                                                                                                                                                              以
                                                                                         
水   、                                                                                         
二甲基亚砜                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (S)-N-{(S)-1-[(S)-1-[(S)-1-((S)-5-Amino-1-carbamoyl-pentylcarbamoyl)-3-carbamoyl-propylcarbamoyl]-2-(1H-indol-3-yl)-ethylcarbamoyl]-3-methyl-butyl}-3-{(S)-2-amino-5-[(2,4-dinitro-phenyl)-hydrazono]-pentanoylamino}-succinamic acid