A new lactone, isoridentin, fromAchillea biebersteinii
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1. A new lactone, isoridentin, with the composition C15H20O4, has been isolated from the epigeal part ofAchillea biebersteinii.
2. On the basis of chemical and spectral information it has been established that isoridentin has the structure of 1,3-dihydroxygermacra-4,10(14),11(13)-trien-6,12-olide.
KeywordsLactone Vanillin Vanillic Acid Sesquiterpene Lactone Glycyrrhizic Acid
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