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

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

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

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

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

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

(4-Nitro-benzylamino)-acetic acid

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

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

[Ethyl-(2-methoxy-benzyl)-amino]-acetic acid

[Isopropyl-(2-methoxy-benzyl)-amino]-acetic acid