8,4′-Oxyneolignaneglucosidesfromanaqueousextractofbanlangen(Isatisindigoticaroot)andtheirabsoluteconfigurations
ActaPharmaceuticaSinicaB
頁數(shù): 9 2017-11-25
摘要: Threepairsofglycosidic8,4′-oxyneolignanediastereoisomers,namedisatioxyneolignosidesA-F(1–6),wereisolatedfromanaqueousextractofIsatisindigoticaroots.Theirstructuresandabsoluteconfigurationswereelucidatedbycomprehensivespectroscopicdataanalysisandenzymehydrolysis.ThevalidityofΔδ_(C8-C7)valuestodistinguishthreoanderythroarylglycerolunitsandCottoneffectsat235±5nmtodetermineabsoluteconfigurationsatC-8in1–6andtheiraglycones(1a–6a)arediscussed. (共9頁)