SEARCH Articles Figures Tables 2,2,6,6-tetramethylpiperidine-N-oxyl TEMPO) 2,2,6,6-tetramethylpiperidinyl-N-oxyl 2-azadamantane-N-oxyls N-Oxyl radicals formed from Oxazolidine-N-oxyl, 4,4-dimethyl synthesis Oxyls— Phthalimide-N-oxyl Tetramethylpiperidine-N-oxyl Tetramethylpiperidine-N-oxyl radical