120563-24-8

1H-Pyrazole-3-carboxylic acid,4-[5-[3-carboxy-1,5-dihydro-5-oxo-1-(2-sulfoethyl)-4H-pyrazol-4-ylidene]-1,3-pentadienyl]-4,5-dihydro-5-oxo-1-(2-sulfoethyl)-, tetrapotassiumsalt