Reagent grade absolute ethanol, methanol, formic acid,
2,2-diphenyl-1-picrylhydrazyl 95% free radical, 2,20-azinobis(3-ethylbenzothiazoline-
6-sulfonic acid), and acetic acid were purchased from
Sigma
Reagent grade absolute ethanol, methanol, formic acid,
2,2-diphenyl-1-picrylhydrazyl 95% free radical, 2,20-azinobis(3-ethylbenzothiazoline-
6-sulfonic acid), and acetic acid were purchased from
Sigma
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