ent-(111S,5R)-15,11-epoxy-11β,12β,14,16α-tetrahydroxy-19β,114-isopropylidenedioxy-5r,6t-dimethyl-(13βH,17βH)-2,8-dioxa-1(12,3)-eudesmana-4(3,2)-pyridina-cyclooctaphane-18,3,8-trione 在
吡啶 作用下,
反应 12.0h,
生成
ent-(111S,5R)-12β,16α,19β,114-tetraacetoxy-11β-benzoyloxy-15,11-epoxy-14-hydroxy-5r,6t-dimethyl-(13βH,17βH)-2,8-dioxa-1(12,3)-eudesmana-4(3,2)-pyridina-cyclooctaphane-18,3,7-trione