29637-18-1 4-(4-(2-(1-Ethylnaphtho(1,2-d)thiazol-2(3H)-ylidene)-1-methylethylidene)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonicacid Benzenesulfonic acid, 4-(4-(2-(1-ethylnaphtho(1,2-d)thiazol-2(3H)-ylidene)-1-methylethylidene)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)- EINECS 249-743-4