Tubulin polymerization-IN-55 is a potent Tubulin Polymerization inhibitor with potential anti-angiogenic and anti-tumor activity, demonstrating anti-proliferative effects against A549, K562, HepG2, MDA-MB-231, and HFL-1.

Potent and selective corticotropin releasing factor receptor-1 (CRF1) agonist (Ki values are 1.5 and 224 nM for CRF1 and CRF2 receptors respectively). Increases ACTH levels and increases faecal pellet output in vivo following i.p. administration.

Epigambogellic acid has antitumor activity and inhibits SMMC-7221 cells and A549 cells.