Structural determination of three new eudesmanolides from Inula helenium

摘要

Ten sesquiterpenens were isolated from Inula helenium. Among them, three eudesmanolides: 15-hydroxy-11 beta H-eudesm-4-en-8 beta,12-olide (1), 3 alpha-hydroxy-11 beta H-eudesm-5-en-8 beta,12-olide (2) and 2 beta,11 alpha-dihydroxy-eudesm-5-en-8 beta,12-olide (3) are new compounds. Their chemical structures were determined by spectral methods including 2D NMR. Copyright (C) 2008 John Wiley & Sons, Ltd.