2-{[1-(4-Methoxy-phenyl)-meth-(E)-ylidene]-amino}-3-methyl-N-[4-(4-nitro-phenylsulfanyl)-phenyl]-butyramide

DL-valyl-N-hydroxyglycine t-butyl ester acetate

3-Methyl-N-[4-(4-nitro-benzenesulfonyl)-phenyl]-2-{[1-(4-nitro-phenyl)-meth-(E)-ylidene]-amino}-butyramide

2-{[1-(4-Chloro-phenyl)-meth-(E)-ylidene]-amino}-3-methyl-N-[4-(4-nitro-benzenesulfonyl)-phenyl]-butyramide

2-{[1-(4-Dimethylamino-phenyl)-meth-(E)-ylidene]-amino}-3-methyl-N-[4-(4-nitro-phenylsulfanyl)-phenyl]-butyramide