Stevia yaconensis var. subeglandulosa afforded in addition to the known guaianolides ludartin and dehydroleucodin a new guaianolide 10-epi-8-deoxycumambrin B whose relative and absolute configurations were established by X-ray crystallography. Chemical transformations of ludartin established its relative and absolute stereochemistry.
摘要 Stevia yaconensis var. 的地上部分。除了已知的
愈创木酚内酯 ludartin 和脱氢亮
氨酸之外,subeglandulosa 还提供了一种新的
愈创木酚内酯 10-epi-8-deoxycumambrin B,其相对和绝对构型由 X 射线晶体学确定。ludartin 的
化学转化建立了其相对和绝对立体
化学。