30957-61-0 BENZOIC ACID, p-((3-METHYL-5-OXO-1-PHENYL-2-PYRAZOLIN-4-YL)AZO)-, 2-(DIETHYLAMIN BRN 0902557 Benzoic acid, p-((3-methyl-5-oxo-1-phenyl-2-pyrazolin-4-yl)azo)-, 2-(diethylamino)ethyl ester p-((3-Methyl-5-oxo-1-phenyl-2-pyrazolin-4-yl)azo)benzoic acid 2-(diethylamino)ethyl ester