Table 1.
In vitro antioxidant activity by DPPH method.
| Compound | Inhibition (%) |
EC50a (µmol/L) | |||||
|---|---|---|---|---|---|---|---|
| 1 µmol/L | 2 µmol/L | 5 µmol/L | 10 µmol/L | 20 µmol/L | 50 µmol/L | ||
| 4a | 2.2±0.1 | 7.5±0.4 | 25.2±1.6 | 47.1±3.3 | 62.8±6.4 | 69.5±4.4 | 15.5±1.5 |
| 4b | 15.1±0.5 | 17.2±0.6 | 22.9±1.2 | 25.5±1.8 | 28.7±1.3 | 35.3±1.5 | >50.0 |
| 4c | 1.6±0.1 | 6.1±0.2 | 19.8±1.8 | 37.8±3.1 | 56.2±3.0 | 65.4±4.3 | 19.7±1.7 |
| 4d | 0.7±0.1 | 4.1±0.3 | 22.0±0.8 | 32.6±2.7 | 63.8±3.6 | 70.1±4.3 | 13.92±1.4 |
| 4e | 0.4±0.01 | 3.8±0.2 | 18.8±1.8 | 37.2±2.5 | 50.9±4.7 | 59.5±3.0 | 22.5±1.7 |
| 5a | 45.3±3.8 | 55.8±2.2 | 64.1±4.0 | 69.0±4.8 | 71.6±2.8 | 75.8±3.7 | 1.2±0.1 |
| 5b | 0.7±0.04 | 2.7±0.1 | 22.19±0.4 | 30.0±4.0 | 39.0±1.9 | 56.3±3.9 | 28.5±1.8 |
| 5c | 36.0±0.9 | 55.8±3.0 | 64.5±2.4 | 68.0±2.5 | 71.1±4.9 | 75.9±4.4 | 1.9±0.1 |
| 5d | 17.2±0.6 | 41.3±3.0 | 60.1±3.6 | 71.8±3.4 | 76.3±5.4 | 90.5±4.9 | 4.0±0.4 |
| 5e | 25.4±0.6 | 42.7±1.5 | 55.0±2.3 | 59.7±3.8 | 64.1±3.4 | 75.9±4.9 | 5.0±0.5 |
| BHTb | 5.6±0.7 | 19.2±1.8 | 28.0±1.7 | 37.5±2.8 | 48.9±3.7 | 60.4±2.9 | 23.4±3.1 |
a
EC50, concentration which possesses 50% radicle scavenging ability.
b
Butylatedhydroxytoluene.