EUDESMANOLIDES FROM Artemisia lehmanniana.CRYSTAL AND MOLECULAR STRUCTURES OF lalpha-ACETOXY-4alpha-HYDROXY-5,7alpha,6,11beta(H)-EUDESM-2,3-EN-6,12-OLIDE AND lalpha-ACETOXY-3alpha-HYDROXY-5,7alpha,6,11beta(H)-EUDESM-4,15-EN-6,12-OLIDE

摘要

Two eudesmane sesquiterpene lactones of composition C_(17)H_(24)O_5 were isolated from the aerial part of Artemisia lehmanniana Bunge.X-ray structure analysis established their crystal and molecular structures.In continuation of research on terpenoids from plants of the Artemisia genus(Asteraceae),we isolated two eudesmane sesquiterpene lactones(1 and 2)with the same composition C_(17)H_(24)O_5 from the aerial part of Lehmann wormwood(Artemisia lehmanniana Bunge)by rechromatography of previously obtained fractions.