Fig. 5
Concentration-response curve analysis for the anti-HIV activity of pure compounds isolated from C. macrostachyus. Results presented in the curves are means ± S.E.M of three independent experiments. Cell viability % (red line) and the inhibition % of the virus-induced cytopathic effect (blue line) associated with control drugs and the tested extracts at the concentration level (800–8.192 × 105 μg/mL); Lupenone (2); Lupeol acetate (3); Betulin (4)