2-甲基-2-丙基2-乙氧基-1-吡咯烷羧酸酯

N-BOC-GAMMA-氨基丁酸

2-甲氧基吡咯烷-1-羧酸叔丁酯

methyl 4-((tert-butoxycarbonyl)amino)butanoate

ethyl 4-[(2-methylpropan-2-yl)oxycarbonylamino]butanoate