乙酸乙烯酯 、
5,11,17,23-Tetratert-butyl-26,27,28-tris(2-hydroxyethoxy)pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(24),3(28),4,6,9,11,13(27),15,17,19(26),21(25),22-dodecaen-25-ol 以
甲苯 为溶剂,
以8%的产率得到2-[[5,11,17,23-Tetratert-butyl-26-hydroxy-27,28-bis(2-hydroxyethoxy)-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]ethyl acetate