Table 1.
IC50 of DPPH and ABTS+ radicals scavenging activity and FRAP values of six flavonoids in Smilax glabra flavonoids extract (SGF).
| Ascorbic Acid | (−)-Epicatechin | Astilbin | Neoastilbin | Isoastilbin | Neoisoastilbin | Engeletin | |
|---|---|---|---|---|---|---|---|
| IC50 of DPPH radical (μg/mL) | 1.90 ± 0.14 | 1.86 ± 0.22 | 7.34 ± 0.22 | 9.14 ± 0.23 | 4.01 ± 0.18 | 5.48 ± 0.22 | >100 |
| IC50 of ABTS+ radical (μg/mL) | 7.26 ± 0.18 | 1.51 ± 0.13 | 6.48 ± 1.13 | 6.84 ± 0.55 | 3.11 ± 0.90 | 1.41 ± 0.55 | 18.1 ± 1.7 |
| FRAP values (µM FeSO4 equivalent amount) | 713 ± 31 | 499 ± 12 | 148 ± 16 | 224 ± 26 | 400 ± 23 | 421 ± 4 | 16.0 ± 2.7 |
Data are expressed as means ± SD (n = 3).