Taltobulin trifluoroacetate is a synthetic analogue of the tripeptide hemiasterlin, is a potent agent of antimicrotubule that circumvents P-glycoprotein-mediated resistance in vitro and in vivo.
Cevipabulin (TTI-237) fumarate is a microtubule-active antitumor compound and inhibits the binding of [3H] vinblastine to tubulin (IC50: 18-40 nM in the human tumor cell line).