A sesquiterpene lactone fromAcroptilon repens
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A new sesquiterpene lactone has been isolated from the epigeal part ofAcroptilon repens, with the composition C19H22O6, mp 199–201°C, M+ 346, and it has been called acroptin (I). The treatment of (I) with acetic anhydride in pyridine gave a diacetate (II). The structure of (I) has been confirmed by the NMR spectra of (I) and (II). Details of the IR and NMR spectra of (I) and (II) are presented.
KeywordsLactone Acetic Anhydride Sesquiterpene Lactone Lactone Ring Epigeal Part
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