摘要
Two novel 28-noroleanane-derived spirocyclic triterpenoids with unusual skeleton structures, phlomisone （1）, phlomistetraol A （2）, were isolated from the roots of Phlomis umbrosa. Their structures were elucidated by spectroscopic methods, including 1D, 2D nuclear magnetic resonance （NMR）, high-resolution mass spectrometry （HR-MS）.
Two novel 28-noroleanane-derived spirocyclic triterpenoids with unusual skeleton structures, phlomisone （1）, phlomistetraol A （2）, were isolated from the roots of Phlomis umbrosa. Their structures were elucidated by spectroscopic methods, including 1D, 2D nuclear magnetic resonance （NMR）, high-resolution mass spectrometry （HR-MS）.
基金
the fund for Doctor of Henan University of Science and Technology.
