3-Hydroxy-2-hydroxymethyl-2-methyl-propionic acid 2-{2-[2-(2-tert-butoxycarbonylamino-ethoxy)-ethoxy]-ethoxy}-ethyl ester   、                                                                                      
4-[(S)-2-(Indan-5-ylcarbamoyl)-pyrrolidin-1-yl]-4-oxo-butyric acid 2-carboxy-3-{4-[(S)-2-(indan-5-ylcarbamoyl)-pyrrolidin-1-yl]-4-oxo-butyryloxy}-2-methyl-propyl ester                                                                                                                                                              在
                                                                                                                                                                                 
N,N'-二环己基碳二亚胺   、                                                                                                  
DPTS                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 [2-[[3-[4-[(2S)-2-(2,3-dihydro-1H-inden-5-ylcarbamoyl)pyrrolidin-1-yl]-4-oxobutanoyl]oxy-2-[[4-[(2S)-2-(2,3-dihydro-1H-inden-5-ylcarbamoyl)pyrrolidin-1-yl]-4-oxobutanoyl]oxymethyl]-2-methylpropanoyl]oxymethyl]-2-methyl-3-[2-[2-[2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]ethoxy]ethoxy]ethoxy]ethoxy]-3-oxopropyl] 3-[4-[(2S)-2-(2,3-dihydro-1H-inden-5-ylcarbamoyl)pyrrolidin-1-yl]-4-oxobutanoyl]oxy-2-[[4-[(2S)-2-(2,3-dihydro-1H-inden-5-ylcarbamoyl)pyrrolidin-1-yl]-4-oxobutanoyl]oxymethyl]-2-methylpropanoate