6(R)-[2-[8(S)-(4-Acetyloxy-2,2-dimethyl-butyryloxy)-2(S),6(R)-dimethyl-1,2,6,7,8,8a-(R)-hexahydronaphthyl-1(S)]ethyl]-4(R)-hydroxy-3,4,5,6-tetrahydro-2H-pyran-2-one 在
sodium hydroxide 作用下,
以
甲醇 、 dihydroxy acid 、
甲苯 为溶剂,
生成
6(R)-[2-[8(S)-(2,2-dimethyl-4-hydroxybutyryloxy)-2(S),6(R)-dimethyl-1,2,6,7,8,8a(R)-hexahydronaphthyl-1(S)]ethyl]-4(R)-hydroxy-3,4,5,6-tetrahydro-2H-pyran-2-one