Figure 4.

Inhibitory effect against CE-OOH formation by the isolated compounds during copper ion-induced oxidation of diluted rat blood plasma. Rat plasma was diluted four-fold with PBS (pH 7.4) and incubated with 100 μM CuSO₄ at 37 °C for 7 h. Each compound was added to the rat plasma solution at a final concentration of 10 μM. Each value is the mean ± SD of three experiments. ^a–d Results with a different letter differ significantly (p < 0.05).