描述:
Isobutyric acid (E)-(3aS,4R,10S,11aR)-9-acetoxy-3,6,10-trimethyl-7-nitro-2-oxo-2,3,3a,4,5,8,9,10,11,11a-decahydro-cyclodeca[b]furan-4-yl ester 在
tin(ll) chloride 作用下,
以40%的产率得到Isobutyric acid (3aS,4R,10S,11aR)-9-acetoxy-6-hydroxy-3,6,10-trimethyl-2,7-dioxo-dodecahydro-cyclodeca[b]furan-4-yl ester