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Chemical structures of bioactive terpenoids and other compounds described in the text. (A) geraniol, (B) irofulven, (C) artesunate, (D) triptolide, (E) ursolic acid, (F) ginsenoside, (G) celastrol, (H) betulinic acid, (I) fucoxanthin, (J) curcumin, (K) gossypol.
