Synonyms: 4-(5-(3-Carboxy-5-hydroxy-1-phenyl-1H-pyrazol-4-yl)penta-2,4-dienylidene)-4,5-dihydroxy-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid;4-[(1E,3E,5Z)-5-(3-carboxy-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-ylidene)penta-1,3-dien-1-yl]-5-oxo-1-phenyl-2,5-dihydro-1H-pyrazole-3-carboxylic acid