oxygen-derived free radicals
an atom or atom group having an unpaired electron on an oxygen atom, typically derived from molecular oxygen. For example, 1-electron reduction of O2 produces the superoxide radical, O2·; other examples include the hydroperoxyl radical (HOO·), the hydroxyl radical (HO·), and nitric oxide (NO·). These apparently have a role in reprofusion injury.
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Examples: glitazone, GI cocktail, etc.