2,2,5,5-四甲基-3-吡啉-1-氧基-3-羧酸

3-[(乙氧基羰基)羰氧基]-2,5-二氢-2,2,5,5-四甲基-1H-吡咯-1-氧基

[3-(甲氧羰基)-2,2,5,5-四甲基-2,5-二氢-1H-吡咯-1-基]氧氮自由基

diethyl (1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-carbonyl)-malonate