2-(2-(3-Methyl-5-oxo-1-(4-sulfophenyl)-2-pyrazolin-4-ylidene)ethylidene)-3-benzoxazolinepropionic acid 3(2H)-Benzoxazolepropanoic acid, 2-((1,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-4H-pyrazol-4-ylidene)ethylidene)- 72796-92-0