pentyl 4-[(2S)-2-[[4-[[2-(dimethylamino)acetyl]amino]-6-phenylpyridine-2-carbonyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoyl]piperazine-1-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
三氟乙酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以108 mg的产率得到(4S)-4-[((4-[(N,N-dimethylglycyl)amino]-6-phenylpyridin-2-yl)carbonyl)amino]-5-oxo-5-(4-[(pentyloxy)carbonyl]piperazin-1-yl)pentanoic acid