5,11,17,23-Tetratert-butyl-26,28-bis(2-diethoxyphosphorylethoxy)pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(24),3,5,7(28),9,11,13(27),15(26),16,18,21(25),22-dodecaene-25,27-diol                                                                                                                                                              在
                                                                                                                                                                                 
三甲基溴硅烷   、                                                                                                  
甲醇                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 8.0h,
                                                                                                                以90%的产率得到2-[[5,11,17,23-Tetratert-butyl-26,28-dihydroxy-27-(2-phosphonoethoxy)-25-pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(24),3,5,7(28),9,11,13(27),15(26),16,18,21(25),22-dodecaenyl]oxy]ethylphosphonic acid