(S)-2-Amino-N-(2-cyano-benzyl)-N-ethyl-propionamide

(S)-2-Amino-N-(4-chloro-benzyl)-N-isopropyl-propionamide

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

(S)-2-Amino-N-(4-chloro-benzyl)-3,N-dimethyl-butyramide

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

(S)-2-Amino-N-cyclopropyl-N-(2,6-dichloro-benzyl)-3-methyl-butyramide

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

[(4-Chloro-benzyl)-methyl-amino]-acetic acid

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

[Cyclopropyl-(2,4-dichloro-benzyl)-amino]-acetic acid

[Cyclopropyl-(4-methyl-benzyl)-amino]-acetic acid