Methyl-N-α-acetyl-L-lysinathydrochlorid N-Acetyl-3-mercapto-DL-valin 6-Aminopenicillansure Carnosin N-Acetyl-3-phenyl-D-alanin Ethyl-N-benzoyl-L-tyrosinat N-Chloracetyl-L-tyrosin Actinomycin D N-[N-(N-Benzoylglycyl)-L-histidyl]-L-leucin Ampicillin N-Acetylglutaminsure N-α-Benzoyl-L-arginin Aspartam N-γ-L-Glutamyl-L-glutaminsure N-Acetyl-L-histidin Valinomycin N-(N-Acetyl-3-phenyl-L-alanyl)-3,5-diiodo-L-tyrosin N-L-γ-Glutamyl-3-phenyl-L-alanin