Figure 5.

The effect of the tested compounds and the quercetin standard in 20 µM concentrations on the viability of H9c2 cells evaluated by the MTT assay. The cardiomyoblastoma cells were treated for 12 h and following the addition of the MTT solution, the plates were incubated for 4 h. Absorbance was measured at 540 and 630 nm. The measurements were carried out in triplicate and repeated two times.