Table 2.
IC50 values of polyphenols tested against the DPPH radical.
| Compound | IC50 (μM)1 |
|---|---|
| BHT (positive control) | 98.8 ± 4.5 |
| BHA (positive control) | 105.4 ± 5.3 |
| 4-ketopinoresinol (3) | 143.3 ± 13.1 |
| 8α-hydroxypinoresinol (4) | 71.5± 5.9 |
| 9α-hydroxypinoresinol | 84.0± 2.9 |
| Abietin | >500 |
| apigenin-7-O-a-L-rhamnopyranosyl-(1→6)-β-D-glucopyranoside (isorhoifolin) | >500 |
| chlorogenic acid | 59.8 ± 4.9 |
| Ciwujiatone | 64.7 ± 5.3 |
| erythro-guaiacylglycerol-β-O-4′-dihydroconiferyl alcohol | >500 |
| kaempferol-3-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranoside (biorobin) | 39.4 ± 2.8 |
| luteolin 4′-O-glucuronide | 38.9 ± 2.5 |
| naringenin-7-O-neohesperidoside | 116.0 ± 9.7 |
| neochlorogenic acid | 65.8 ± 4.8 |
| nortrachelogenin (1) | 38.6 ± 2.7 |
| nortrachelogenin-4,4′-di-O-β-D-glucopyranoside (2) | 34.4 ± 2.3 |
| pinoresinol | 50.8 ± 3.1 |
| quercetin-3-O-α-l-rhamnopyranosyl-(1→6)-β-D-glucopyranoside (rutin) | 63.0 ± 4.6 |
| quercitrin | 12.2 ± 1.0 |
| sinapic aldehyde | 53.4 ± 3.8 |
1Values represent averages ± standard deviations for triplicate experiments.