15096-02-3 1H-Pyrazole-3-carboxylic acid, 4-hydroxy-1-phenyl-5-(phenylazo), ethyl ester 1H-Pyrazole-3-carboxylic acid, 4-hydroxy-1-phenyl-5-(phenylazo)-, ethyl ester EINECS 239-146-7 Ethyl 4-hydroxy-1-phenyl-5-(phenylazo)-1H-pyrazole-3-carboxylate