Dolastatin 10 trifluoroacetate is a potent antimitotic polypeptide isolated from a marine animal and is developed as a potential antitumor agent. Dolastatin 10 is found to have an activity to inhibit tubulin polymerization (IC50: 1.2 μM). Besides that, it
Cornigerine is a natural product analog of colchicine produced by Colchicum cornigerum that inhibited tubulin polymerization both with and without microtubule-associated proteins, inhibited the binding of radiolabeled colchicine to tubulin, and stimulated tubulin-dependentGTP hydrolysis.