Development of a Hepatoprotective Herbal Drug from Turnera diffusa

Figure 4

PCA analysis of ¹H-NMR data of extracts (red) and HM (green) of T. diffusa samples. The shadowed areas indicate the Hotelling ellipse (95%). As can be seen, in both groups, sample 9 is far from their respective cluster, and in the case of HM samples, it is outside of the confidence area delimited by the dashed line. This statistical deviation of HM9 is related to variations in the resonance patterns detected in the NMR spectra.