Biological Safety Studies and Simultaneous Determination of Linagliptin and Synthetic Impurities by LC-PDA

Figure 2

Chromatogram obtained for linagliptin and impurities under optimized chromatographic conditions: IMP 1 (impurity 1 at 3.91 min); LGT (linagliptin at 5.52 min); IMP 2 (impurity 2 at 7.47 min); IMP 3 (impurity 3 at 8.42 min).