3-Hydroxy-4,15-dinor-1(5)-xanthen-12,8-olide
https://www.immunecentral.com/shop/cell25sk4134-3-hydroxy-415-dinor-1-5-xanthen-128-olide-217511
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3-Hydroxy-4,15-dinor-1(5)-xanthen-12,8-olide is a Sesquiterpenoids product that can be isolated from the roots of Xanthium sibiricum[1].
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