(2,4-dioxopyrrolidin-1-yl)acetamide hydrochloride

N-羟乙基-2-吡咯烷酮

N-(2-amino-2-oxoethyl)-4-chlorobutanamide

ethyl (2,5-dihydro-4-methoxy-2-oxo-1H-pyrrol-1-yl)acetate

(1,5-dihydro-4-methoxy-2-oxo-2H-pyrrol-1-yl)acetamide