3-ethyl 4,5-dihydro-5-oxo-1-(4-sulphophenyl)-4-[3-(tetrahydro-1,3-dimethyl-2,4,6-trioxo-5(2H)-pyrimidinylidene)prop-1-enyl]-1H-pyrazole-3-carboxylate

4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-[3-[(hexahydro-1,3-dimethyl-2,4,6-trioxopyrimidin)-5-ylidene]-1-propenyl]-1H-pyrazole-3-carboxylic acid 3-ethyl ester