4-Carboxy-2,2,6,6-tetramethylpiperidine1-oxyl
2,2,6,6-Tetramethylpiperidin-4-yl methacrylate
4-Oxo-tempo
3-Carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxy
2,2,6,6-Tetramethyl-4-(benzoyloxy)piperidine-1-oxyl
2,2,6,6-Tetramethyl-4-(2-propynyloxy)piperidine 1-oxyl
9-Azabicyclo[3.3.1]nonane n-oxyl
2-Azaadamantane-N-oxyl
