2-(4-(1,5-DIHYDRO-3-METHYL-5-OXO-1-(4-SULPHOPHENYL)-4H-PYRAZOL-4-YLIDENE)BUT-2-ENYLIDENE)-3-ETHYL-2,3-DIHYDROBENZOXAZOLE-5-SULPHONIC ACID
2-(4-(1,5-dihydro-3-methyl-5-oxo-1-(4-sulphophenyl)-4h-pyrazol-4-ylidene)but-2-enylidene)-3-ethyl-2,3-dihydrobenzoxazole-5-sulphonic acid