1-Phenyl-3-methyl-4-(2-carboxyphenylazo)-5(4H)-pyrazolone 296761-50-7 30926-22-8 4-((4,5-Dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)benzoic acid BENZOIC ACID, p-((3-METHYL-5-OXO-1-PHENYL-2-PYRAZOLIN-4-YL)AZO)- BRN 0895994 Benzoic acid, 4-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)- EINECS 250-392-4 p-((3-Methyl-5-oxo-1-phenyl-2-pyrazolin-4-yl)azo)benzoic acid