2-氧代-1-吡咯烷乙酸甲酯

(1-Pyrrolin-2-yloxy)essigsaeure-methylester

1-(3-氨基丙基)-2-吡咯烷酮

4-(2-氧代-1-吡咯烷)-丁酸

(2-氧代-吡咯烷-1-基)-乙酸