2-[ethylcarbamoyl-(5-nitro-1,3-thiazol-2-yl)amino]acetamide

2-[ethylcarbamoyl-(5-nitro-1,3-thiazol-2-yl)amino]-N-methylacetamide

2-[(2E)-2-(ethylcarbamoylimino)-5-nitro-1,3-thiazol-3-yl]-N,N-dipropylacetamide

N-ethylcarbamoyl-N-(5-nitro-thiazol-2-yl)-glycine dipropylamide