ethyl (1-oxyl-4-formyl-2,2,5,5-tetramethylpyrrolidin-3-yl)-acetate

3-(2,2,5,5-四甲基吡咯啉基-1-氧基)丙烯-2-酸乙酯

2-(1-甲基-2-吡咯烷基亚基)乙酸乙酯

ethyl 3-methyl-5-oxoundecanoate

4-(叔丁氧基羰基氨基)-3-氧代丁酸乙酯