| HPLC | High-performance liquid chromatography |
| HCA | Hierarchical cluster analysis |
| PCA | Principal component analysis |
| PLS-DA | Partial least squares discriminant analysis |
| PCC | Phellodendri Chinensis Cortex |
| PAC | Phellodendri amurensis cortex |
| TCM | Traditional Chinese medicine |
| VIP | Variable importance for the project |
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