Table 3.
Screening of antioxidants in the Gynura procumbens polyphenolic compounds.
| Peak No. | Compound | Initial Concentration (μg/mL) |
Concentration after DPPH Reaction (μg/mL) |
Reactive Concentration (μg/mL (%)) |
|---|---|---|---|---|
| 1 | Chlorogenic acid | 85.16 ± 0.06 G | 50.84 ± 0.01 G | 34.33 ± 0.06 G (40.31 ± 0.04 F) |
| 2 | Oxypeucedanin | 13.78 ± 0.19 C | 7.70 ± 0.18 C | 6.07 ± 0.11 C (44.06 ± 0.79 I) |
| 3 | Isoimperatorin | 32.77 ± 0.01 E | 21.84 ± 0.03 D | 10.93 ± 0.03 E (33.36 ± 0.09 D) |
| 4 | Indol-3-Carboxylic acid | 6.36 ± 0.01 A | 4.50 ± 0.01 A | 1.85 ± 0.01 A (29.17 ± 0.21 C) |
| 5 | Kynurenic acid | 107.62 ± 0.13 H | 60.57 ± 0.1 H | 47.05 ± 0.22 H (43.72 ± 0.16 H) |
| 6 | Caffeic acid | 180.69 ± 0.01 I | 104.52 ± 0.01 I | 76.18 ± 0.02 I (42.16 ± 0.01 G) |
| 7 | Coumaric acid | 8.40 ± 0.01 B | 5.34 ± 0.01 B | 3.06 ± 0.01 B (36.39 ± 0.12 E) |
| 8 | Lutein | 30.60 ± 0.06 D | 22.97 ± 0.06 E | 7.63 ± 0.01 D (24.93 ± 0.04 A) |
| 9 | Luteolin | 56.04 ± 0.02 F | 40.87 ± 0.02 F | 15.16 ± 0.02 F (27.06 ± 0.03 B) |
All values are mean ± SD (n = 3). A–I Means with different superscripts in the same column are significantly different at p < 0.05 by Duncan’s multiple range tests.