The structure of alloglaucotoxigenin is shown to be that of 3β, 14β, 15β-trihydroxy-19-oxo-5α-carda-20:22-enolide (IV) in the following way: The 19-oxo group could be eliminated by reduction of the corresponding mercaptal. The structure of the resulting 3β, 14β, 15β-trihydroxy-5α-carda-20:22-enolide, obtained in the acetylated form, was established through degradation and through partial synthesis
变色
青霉素毒素的结构显示为3β,14β,15β-三羟基-19-oxo-5α-carda-20:22-烯醇内酯(IV)的结构:19-oxo基可以通过还原相应的
硫醇。所得3β的结构,14β,15β三羟基- 5α-carda-20:22-enolide,在乙酰化形式获得,通过降解和通过处理Δ的部分合成建立14 -anhydro-uzarigenin(XIII)与四氧化os。还大量形成了异构体3β,14α,15α-三羟基-烯属内酯。物质XI在其旋光色散曲线中显示为正,物质XIV显示为负CO
TTON效应。