In Vitro Cytotoxicity and Anti-HIV Activity of Crude Extracts of Croton macrostachyus , Croton megalocarpus and Croton dichogamus .

could be considered as promising extracts as they display high antiviral activity with low toxicity and high selectivity index values. To investigate the active constituents responsible for the anti-HIV activity, chemical identification of the active constituents is now in progress in our laboratory. Since there is no previously reported anti-HIV activity for these plants, there is a great need to isolate the compounds responsible for the noted activity.