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(2007/10/02)(R)-2-((2S,3S)-2-Amino-3-methyl-pentanoylamino)-succinic acid
(2S,3S)-3-Methyl-2-{[(S)-1-(2,2,2-trifluoro-acetyl)-pyrrolidine-2-carbonyl]-amino}-pentanoic acid methyl ester
(R)-2-{[(S)-1-(2,2,2-Trifluoro-acetyl)-pyrrolidine-2-carbonyl]-amino}-succinic acid dimethyl ester
(R)-3-Phenyl-2-{[(S)-1-(2,2,2-trifluoro-acetyl)-pyrrolidine-2-carbonyl]-amino}-propionic acid methyl ester
(R)-2-{[(S)-1-(2,2,2-Trifluoro-acetyl)-pyrrolidine-2-carbonyl]-amino}-pentanedioic acid dimethyl ester