1,2-Pyrrolidinedicarboxylic acid, 4-amino-, 1-(1,1-dimethylethyl) 2-methyl ester, hydrochloride (1:1), (2S,4R)-
1,2-Pyrrolidinedicarboxylic acid, 4-amino-, 1-(1,1-dimethylethyl) 2-methyl ester, monohydrochloride, (2S,4R)-
(2S,4R)-4-Amino-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid methyl ester hydrochloride
1-tert-Butyl 2-methyl (2S,4R)-4-aminopyrrolidine-1,2-dicarboxylate hydrochloride