| TFSR | Total flavonoids in sunflower receptacles |
| UHPLC-HRMS/MS | Ultimate 3000 Nano LC System coupled to a Q Exactive HF benchtop Orbitrap mass spectrometer |
| DPPH | 2,2-Diphenyl-1-picrylhydrazyl |
| ABTS | 2,2-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) |
| BHT | Butylated hydroxytoluene |
| PEF | Petroleum ether fraction |
| EAF | Ethyl acetate fraction |
| nBUF | n-Butanol fraction |
| WAF | Water fraction |
| Df | Degree of freedom |
| RT | Retention time |
| Rt | Retention time |
| Fr | Fragment |
| CUPRAC | Cupric ion reducing antioxidant capacity |
| ANOVA | One-way analysis of variance |
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