Comparison of Chemical Constituents in Pseudostellariae Radix with Different Dosage Forms Based on HPLC-Q-Exactive Orbitrap/MS Combined with Multivariate Statistical Analysis

Figure 4

OPLS-DA scores plot and S-plot of PR decoction pieces and formula granules. The scores plot of OPLS-DA revealed that PR decoction pieces and PR formula granules were significantly different in the two classes in the positive mode (a) and negative mode (b). S-plots indicated that the farther the distance from the central region represented the metabolites contributing more to the separation between groups in the positive mode (c) and negative mode (d).

(a)

(b)

(c)

(d)