Fig. 2
From: In vitro toxic evaluation of two gliptins and their main impurities of synthesis
Cell viability evaluated by the neutral red uptake in 3 T3 cells after 24 h incubations with: a sitagliptin - STG, b impurity S1, c impurity S2, d vildagliptin - VLG, e impurity V1, f impurity V2. Results are expressed as mean ± standard error of the mean. Statistical analysis performed through ANOVA/Bonferroni (**p < 0.01; ***p < 0.001 versus control)