Z-Hydrazinoformyl-carbohydrazidoformyl-glycin-ethylester, 'Z-Azaglycyl-azaglycyl-azaglycyl'-glycin-ethylester
1-Benzyloxycarbonyl-5-(p-nitro-phenoxycarbonyl)-carbohydrazid, 'Z-Azaglycyl-azaglycin'-(p-nitro-phenylester)
benzyloxycarbonylcarbazide
1-Z-5-(O-Ethyl-glycyl-N-carbonyl)-carbohydrazid, 'Z-Azaglycyl-azaglycyl'-glycin-ethylester