15-Acetoxy-2α-angeloyloxy-8β-hydroxycostunolid 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 0.02h,
以10 mg的产率得到(Z)-2-Methyl-but-2-enoic acid (6E,10Z)-(3R,3aR,4R,8S,11aR)-4-hydroxy-10-hydroxymethyl-3-methoxymethyl-6-methyl-2-oxo-2,3,3a,4,5,8,9,11a-octahydro-cyclodeca[b]furan-8-yl ester