Natural compound toxicity.

Viability of A) TZM-bl cells and B) HeLa cell after 24 hours of treatment with different concentrations of Myricetin (range: 0.01–100 µM), Quercetin and Pinocembrin. (n = 9). TZM: negative control (only cells); Veh: vehicle control and AZT: positive control. Values shown with an asterisk (*) are statistically significant, when compared with the negative control (only cells).