(1S,2R,4R,5R,9S,10R,13R,14R,15R,19S)-13-Ethyl-4,14-dihydroxy-7,17-bis-(4-methoxy-phenyl)-2,4,10,14,19,20-hexamethyl-6,8,12,16,18-pentaoxa-tricyclo[13.3.1.1
5,9]icosan-11-one 在
sodium hydroxide 、
乙醇 作用下,
以
四氢呋喃 为溶剂,
以100%的产率得到(R)-2-[(4S,6R)-6-{(1R,3R)-3-[(4S,5S,6R)-6-((1R,2R)-1,2-Dihydroxy-1-methyl-butyl)-2-(4-methoxy-phenyl)-5-methyl-[1,3]dioxan-4-yl]-1-hydroxy-1-methyl-butyl}-2-(4-methoxy-phenyl)-5-methyl-[1,3]dioxan-4-yl]-propionic acid