(2S)-1-甲酰基吡咯烷-2-羧酸

丁炔二酸二甲酯

1-(3-diazo-2-propanone)-2-oxopyrrolidine

dimethyl 3-oxo-3,3a,5,6,7,8a-hexahydro-2H-furo[2,3-b]pyrrolizine-8,8a-dicarboxylate

(2-氧代-吡咯烷-1-基)-乙酸