2,2,5,5-四甲基-3-吡咯啉-3-氨甲酰胺

4-oxo-3,3,5,5-tetrachloro-2,2,6,6-tetramethylpiperidine

dimethyl (E)-2-(2,2,6,6-tetramethyl-4-oxopiperidin-1-yl)but-2-enedioate

(1-氧基-2,2,5,5,-四甲基-?3-吡咯啉)甲醛

5,5-dimethyl-3-methylidenepyrrolidin-2-one