(2E,6E,8E)-(4S,5S)-5-(tert-Butyl-dimethyl-silanyloxy)-10-[(2R,3S,6S,8R,9S)-8-((1E,3E)-4-carboxy-3-methyl-buta-1,3-dienyl)-3,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-yl]-4,8-dimethyl-deca-2,6,8-trienoic acid                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二甲基丙烯基脲   、                                                                                                  
四丁基氟化铵                                                                                                                                  作用下,
                                                                                                                                                                                        反应 20.0h,
                                                                                                                以4.8 mg的产率得到(2E,6E,8E)-(4S,5S)-10-{(2R,3S,6S,8R,9S)-8-[(1E,3E)-4-carboxy-3-methyl-buta-1,3-dienyl]-3,9-dimethyl-1,7-dioxa-spiro(5.5)undec-2-yl}-5-hydroxy-4,8-dimethyl-deca-2,6,8-trienoic acid