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3-[(2-Chloro-acetylamino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

((R)-1-benzyl-pyrrolidin-3-ylamino)-acetic acid

((S)-1-benzyl-pyrrolidin-3-ylamino)-acetic acid

3-(Carboxymethyl-cyclopropyl-amino)-pyrrolidine-1-carboxylic acid benzyl ester

(R)-3-(carboxymethyl-cyclopropyl-amino)-pyrrolidine-1-carboxylic acid benzyl ester

(S)-3-(carboxymethyl-cyclopropyl-amino)-pyrrolidine-1-carboxylic acid benzyl ester

(S)-2-[(carboxymethyl-cyclopropyl-amino)-methyl]-pyrrolidine-1-carboxylic acid benzyl ester

3-[(Carboxymethyl-cyclopropyl-amino)-methyl]-pyrrolidine-1-carboxylic acid benzyl ester

(S)-2-amino-n-((s)-1-benzyl-pyrrolidin-2-ylmethyl)-n-cyclopropyl-3-methyl-butyramide

2-[(Carboxymethyl-cyclopropyl-amino)-methyl]-pyrrolidine-1-carboxylic acid benzyl ester