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Dose–response curve of the synthesized antioxidants 11a (A) and 11b (B) on O2−. scavenging activity and the IC50 values of several antioxidants (C).
Incubation in 10 mM phosphate buffer (pH 7.5) for 2 min at 25 °C; Responses were expressed as chemiluminescence for the concentration (−log[C], M) of antioxidants 11a (A) and 11b (B); All bars were expressed as the mean ± S.D. (C) 8: p-Hydroquinone, 9: catechol.
