| EU | Eucommia ulmoides Oliver |
| EUP | the pollen of Eucommia ulmoides Oliver |
| EUF | Male flowers of Eucommia ulmoides Oliver |
| DPPH | 2,2-Diphenyl-1-picrylhydrazyl |
| HPLC | high-performance liquid chromatography |
| NMR | nuclear magnetic resonance |
| QSH | quercetin-3-O-sophoroside |
| QSB | quercetin-3-O-sambubioside |
| QNH | quercetin 3-O-neohesperidoside |
| NHC | the National Health Commission |
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