Combretastatin is a small organic molecule found in the bark of the African bush willow tree Combretum caffrum. Combretastatin-A4 Prodrug Inducer. Melting Point: 101-103ºC , Solubility: Chloroform, Method for determining Identity: H NMR Spectroscopic Analysis , TLC Conditions: SiO2: Dichloromethane: Methanol: 9: 1, 0.2, Visualized with UV and AMCS, Rf=0.7, Storage and Stability: May be stored at RT for short-term only. Long-term storage is recommended at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.