Figure 4.
Principal component analysis (PCA) plots with (A) principal components 1 and 2 and (B) principal components 1 and 3, using contents of 12 saponins as input data. The 12 saponins are notoginsenoside R1, ginsenosides Rg1, Re, Rh1, Rg2, 20R-Rg2, Rb1, Rc, Rb2, Rb3, Rd and Rg3. The group numbers of Panax extracts are listed in Table 1.