(E)-(8S,11S,17R)-11-((1R,2R,3S)-3-Chloro-2-hydroxy-1-methyl-3-phenyl-propyl)-17-(3-chloro-4-methoxy-benzyl)-8-isobutyl-7,10-dioxa-16,19-diaza-spiro[4.15]icos-13-ene-6,9,15,18-tetraone                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (E)-(8S,11S,17R)-17-(3-Chloro-4-methoxy-benzyl)-8-isobutyl-11-[(S)-1-((2R,3R)-3-phenyl-oxiranyl)-ethyl]-7,10-dioxa-16,19-diaza-spiro[4.15]icos-13-ene-6,9,15,18-tetraone