(S)-2-(2-Oxo-propionylamino)-propionic acid (S)-1-((S)-1-carbamoyl-2-phenyl-ethylcarbamoyl)-2-methyl-propyl ester                                                                                                                                                              在
                                                                                                                                                                                 
氢氟酸                                                                                                                                  作用下,
                                                                                                                                                                                        反应 1.0h,
                                                                                                                以74%的产率得到(3S,9S,12S)-9-Benzyl-6-hydroxy-12-isopropyl-3,6-dimethyl-1-oxa-4,7,10-triaza-cyclododecane-2,5,8,11-tetraone