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

(S)-2-Amino-N-(2-methoxy-benzyl)-N-methyl-propionamide

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

(S)-2-Amino-N-cyclopropyl-N-(2-methoxy-benzyl)-propionamide

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

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

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

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

(2-Iodo-benzylamino)-acetic acid

[Methyl-(4-nitro-benzyl)-amino]-acetic acid

[(2,3-Dichloro-benzyl)-isopropyl-amino]-acetic acid