tert-butyl (S)-2-formyl-5-oxopyrrolidine-1-carboxylate

N-(tert-butoxycarbonyl)-2-[(tert-butyldimethylsilyl)oxy]pyrrole

(S)-1-(tert-butyloxycarbonyl)-5-(trityloxymethyl)-2-pyrrolidinone

2-[(2,2-dimethyl-[1,3]dioxolan-4-yl)hydroxymethyl]-5-oxo-2,5-dihydro-1H-pyrrole-1-carboxylic acid tert-butyl ester

(2S)-N-(叔-丁基氧羰基)-O-(叔-丁基)二甲基硅烷基-焦谷氨醇