Is Oxireno[9,10]cyclodeca[1,2-b]furan-9(1aH)-one, 2,3,6,7,7a,8,10a,10b-octahydro-1a,5-dimethyl-8-methylene-,(1aR,4E,7aS,10aS,10bR)-,(1S,2R,4R,7E,11S)-4,8-dimethyl-12-methylidene-3,14-dioxatricyclo[9.3.0.0^{2,4}]tetradec-7-en-13-one vegan?

Parthenolide is also known as Oxireno[9,10]cyclodeca[1,2-b]furan-9(1aH)-one, 2,3,6,7,7a,8,10a,10b-octahydro-1a,5-dimethyl-8-methylene-,(1aR,4E,7aS,10aS,10bR)-,(1S,2R,4R,7E,11S)-4,8-dimethyl-12-methylidene-3,14-dioxatricyclo[9.3.0.0^{2,4}]tetradec-7-en-13-one.

Parthenolide is a sesquiterpene lactone of the germacranolide class, occurring naturally in feverfew (Tanacetum parthenium) and tansy, found in highest concentration in the flowers and fruit.

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