(1S,2R,3E,7S,15Z,18R)-2-(methoxymethoxy)-7,20,20-trimethyl-6,19,21-trioxabicyclo[16.3.0]henicosa-3,15-dien-5-one 在
palladium on barium sulfate 、
氢气 作用下,
以
乙酸乙酯 为溶剂,
以70%的产率得到(1S,2R,3E,7S,18R)-2-(methoxymethoxy)-7,20,20-trimethyl-6,19,21-trioxabicyclo[16.3.0]henicos-3-en-5-one