4-[4-[[[1-(4-Carboxyphenyl)-1,5-dihydro-3-methyl-5-oxo-4H-pyrazol]-4-ylidene]methyl]-5-hydroxy-3-methyl-1H-pyrazol-1-yl]benzoic acid

4-[4-[[1-(4-carboxyphenyl)-1,5-dihydro-3-methyl-5-oxo-4H-pyrazole-4-ylidene]methyl]-5-hydroxy-3-methyl-1H-pyrazole-1-yl]benzoic acid