(S)-2-((3aR)-4ξ-hydroxy-7-oxo-1c,6c-dimethyl-(8acH)-octahydro-3H-1t,5t-cycloazulenyl-(3ar))-propionic acid 在
乙醚 作用下,
生成 (
S)-2-((3a
R)-4
t.7-diacetoxy-1
c.6-dimethyl-(8a
cH)-1.2.4.5.8.8a-hexahydro-3
H-1
t..5
t-cyclo-azulenyl-(3a
r))-propionic acid methyl ester