Table 1. Radical scavenging activities of stilbenoids 1–5 on DDPH and •OH radicals.
IC50 (µM) | ||
Compounds | DPPH | •OH |
Imbricatin (1) | 8.37±0.61 | 0.034±0.011 |
Methoxycoelonin (2) | 9.01±0.93 | 0.035±0.008 |
Gigantol (3) | 14.01±1.69 | 0.157±0.039 |
Flavidin (4) | 6.61±1.07 | 0.076±0.014 |
Coelonin (5) | 8.47±1.58 | 0.079±0.018 |
Quercetin | 2.42±0.65 | 0.045±0.012 |
Results are expressed as IC50 (mean ± sd) of stilbenoids 1–5 determined on DPPH and •OH radical scavenging. IC50 concentration causing half-maximal neutralization of radical DPPH or •OH. Quercetin was used as a standard reference.