1-Cbz-[1,4]diazepan-5-one

Benzyl 5-Oxo-1,4-diazepane-1-carboxylate

5-Oxo-[1,4]diazepane-1-carboxylic acid benzyl ester

1H-1,4-Diazepine-1-carboxylic acid, hexahydro-5-oxo-, phenylmethyl ester