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PCA analysis results of CP group (A), VO group (B), TR group (C), OS group (D) and AA group (E).
Notes: KMO statistic of the dates > 0.5 and Bartlett spherical test of the date < 0.05, these met the requirements and were applicable to PCA analysis. Crude polysaccharides group (CP), Volatile oils group (VO), Triterpenoids group (TR), Oligosaccharides group (OS), Amino acids group (AA).
