Chemical Differentiation of Dendrobium officinale and Dendrobium devonianum by Using HPLC Fingerprints, HPLC-ESI-MS, and HPTLC Analyses

Figure 3

The scores plot obtained from PCA analysis of D. officinale and D. devonianum. The scores plot of PCA revealed that the 15 selected common peaks were informative to distinguish the chemical difference of D. officinale and D. devonianum, and the 20 samples were densely classified into two major groups and clearly differentiated from each other.