(S)-2-Amino-N-methyl-N-(4-nitro-benzyl)-propionamide

(S)-2-Amino-N-methyl-N-(3-nitro-benzyl)-propionamide

(S)-2-Amino-N-(2-iodo-benzyl)-N-isopropyl-propionamide

(S)-2-Amino-N-(3-cyano-benzyl)-N-cyclopropyl-propionamide

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

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

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

(3-Nitro-benzylamino)-acetic acid

[(3-Cyano-benzyl)-methyl-amino]-acetic acid

[Ethyl-(3-trifluoromethyl-benzyl)-amino]-acetic acid

[Isopropyl-(3-nitro-benzyl)-amino]-acetic acid