SEARCH Articles Figures Tables 2,2,6,6-Tetramethylpiperidin-l-oxyl 2,2,6,6-Tetramethylpiperidines 2,2,6,6-tetramethylpiperidine-1 -oxyl 2.2.6.6- Tetramethylpiperidine-l-oxyl Electron paramagnetic Electron paramagnetic resonance Electronic paramagnetic resonance Oxyls— Paramagnetic resonance Tetramethylpiperidin