(2S,3R,4S,5S,6R)-2-[(2R,3R,4S,5R,6R)-2-[(1S,2S,4S,5'R,6R,7S,8R,9S,10R,12S,13S,15S,16R,18R)-10,15-dihydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosane-6,2'-oxane]-16-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol 在
吡啶 、
盐酸 作用下,
以
甲醇 为溶剂,
反应 2.0h,
生成
(2aR,4R,5S,5'R,6aS,6bS,8R,8aS,8bR,9S,10R,11aS,12aS,12bS)-5',6a,8a,9-tetramethyldocosahydrospiro[naphtho[2',1':4,5]indeno[2,1-b]furan-10,2'-pyran]-4,5,8-triyl triacetate