Triacetonediamine
Tropine
4-Hydroxy-2,2,6,6-tetramethyl-piperidinooxy
4-Oxo-2,2,6,6-tetramethylpiperidinooxy
2,2,6,6-Tetramethylpiperidine
2,2,6,6-Tetramethyl-4-piperidinol
TEMPO
(1R,3s,5S)-3-(3-Isopropyl-5-methyl-4H-1,2,4-triazol-4-yl)-8-azabicyclo[3.2.1]octane
4-Methylpiperidine
1-METHYL-PIPERIDINE-4-CARBOXYLIC ACID