Combretastatin A-1 is a potent microtubule inhibitor with anti-tumour and anti-vascular activity, acting through microtubule protein depolymerisation-mediated inactivation of AKT to inhibit the Wnt/β-catenin pathway, and can be used to study hepatocellular carcinoma.

3,5-Dimethoxy-2,7-phenanthrenediol (compound 2) is a phenanthrene compound isolated from the roots of Combretum laxum. 3,5-Dimethoxy-2,7-phenanthrenediol is cytotoxic to human cancer cell lines 786-0, MCF-7 and NCI/ADR-RES, with IC50s of 73.26 μM, 118.40 μM and 83.99 μM respectively. 3,5-Dimethoxy-2,7-phenanthrenediol also has free radical scavenging activity with an IC50 of 20.4 μM.

1-Hydroxy-2,3,4,7-tetramethoxy-xanthone has vasodilatory action, it can cause vasodilation in the coronary artery pre-contracted with 1uM 5-hydroxytryptamine (5-HT), with the EC 50 value of 6.6±1.4 uM.