N-<3(RS)--1-oxo-2-benzylpropyl>glycine benzylamide

((S)-7-{2-[(Benzyloxy-formyl-amino)-methyl]-3-phenyl-propionylamino}-8-oxo-7,8-dihydro-6H-5-oxa-9-aza-benzocyclohepten-9-yl)-acetic acid benzyl ester

N-[3(RS)-(N-formyl-N-hydroxyamino)-1-oxo-2-benzylpropyl]glycine benzylamide

N-<3(RS)--1-oxo-2-benzylpropyl>glycine isopentylamide

N-[3(RS)-(N-formyl-N-hydroxyamino)-1-oxo-2-benzylpropyl]glycine isopentylamide