6-methoxy-7-nitro-1H-quinazoline-2,4-dione

2-(5-nitro-1H-indol-3-yl)-2-oxoacetyl chloride

5-Nitro-indolyl-3-glyoxylsaeure

2-[[2-(2-carboxyanilino)-2-oxoacetyl]amino]benzoic acid

4-ethyl-4-hydroxyhexan-3-one