| 翻訳と辞書 | Helenin| Alantolactone  : ウィキペディア英語版 | 
 
 Helenin is a phytochemical mixture found in many plant species, including the ''Inula helenium'' (elecampane) of the Asteraceae family.  It is a mixture of two isomeric sesquiterpene lactones, alantolactone and isoalantolactone.
 In 1895 a German scientists Julius Bredt and Wilhelm Posh extracted helenin from ''Inula helenium'' and determined its physical and chemical properties.
 ==Natural sources==
 Alantolactone occurs in the roots of ''Inula helenium'' and other ''Inula'' species.
 
 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』
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