1-Pyrrolidinecarboxylic acid, 3-amino-4-hydroxy-, 1,1-dimethylethyl ester, (3S,4R)-
1-Pyrrolidinecarboxylic acid, 3-amino-4-hydroxy-, 1,1-dimethylethyl ester, (3S-cis)-
1,1-Dimethylethyl (3S,4R)-3-amino-4-hydroxy-1-pyrrolidinecarboxylate
(3S,4R)-3-Amino-4-hydroxypyrrolidine-1-carboxylic acid tert-butyl ester