1-[[ethoxy(methyl)phosphoryl]oxy-methylphosphoryl]oxyethane

tert-butyl 2-oxopyrrolidine-3-carboxylate

3-羟基-2-吡咯烷酮

5-乙基-3,4-二氢-2H-吡咯

5-(4-甲氧基苯基)-3,4-二氢-2H-吡咯