乙酸酐 、
(3S,3aS,4S,6S,7aS,9aR)-4,6-Dihydroxy-3,5,7a-trimethyl-3,3a,4,6,7,7a,9,9a-octahydro-azuleno[6,5-b]furan-2,8-dione 以
吡啶 为溶剂,
以14 mg的产率得到Acetic acid (3S,3aR,4S,6S,7aS,9aR)-6-acetoxy-3,5,7a-trimethyl-2,8-dioxo-2,3,3a,4,6,7,7a,8,9,9a-decahydro-azuleno[6,5-b]furan-4-yl ester