(S)-2-Amino-N-(4-bromo-benzyl)-N-ethyl-propionamide

(S)-2-Amino-N-(2-chloro-benzyl)-3,N-dimethyl-butyramide

(S)-2-Amino-N-(4-bromo-benzyl)-N-ethyl-3-methyl-butyramide

(S)-2-Amino-N-(2-chloro-benzyl)-N-isopropyl-3-methyl-butyramide

(S)-2-Amino-N-isopropyl-3-methyl-N-(2-methyl-benzyl)-butyramide

(S)-2-Amino-N-(4-cyano-benzyl)-N-cyclopropyl-3-methyl-butyramide

(S)-2-Amino-N-(2-chloro-benzyl)-N-cyclopropyl-3-methyl-butyramide

(3-Methyl-benzylamino)-acetic acid

[(4-Cyano-benzyl)-ethyl-amino]-acetic acid

[(4-Bromo-benzyl)-ethyl-amino]-acetic acid

[(4-Cyano-benzyl)-isopropyl-amino]-acetic acid