Tubulin inhibitor 1 is an inhibitor of tubulin, inhibits tubulin polymerization, with potent anti-tumor activity, induces cellular apoptosis causes and cellular mitotic arrest in the G2/M phase.
Tubulysin D is a tetrapeptide isolated from the myxobacterial species Archangium geophyra and Angiococcus disciformis, and displays potent antitumor activity.
Ombrabulin is a derivative of CA-4 phosphate. It is known to show antivascular effects through selective disruption of the tubulin cytoskeleton of endothelial cells.