ethyl (E,4S)-4-[[(2S)-2-[[(2S)-2-amino-3-methyl-3-phenylbutanoyl]amino]-3,3-dimethylbutanoyl]-methylamino]-2,5-dimethylhex-2-enoate                                                                                                                                                              在
                                                                                                                                                                                 lithium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (E,4S)-4-[[(2S)-2-[[(2S)-2-amino-3-methyl-3-phenylbutanoyl]amino]-3,3-dimethylbutanoyl]-methylamino]-2,5-dimethylhex-2-enoic acid