Synonyms: 1H-Pyrazole-3-carboxylicacid, 4-[[4-[[2-(acetyloxy)ethoxy]carbonyl]phenyl]azo]-4,5-dihydro-5-oxo-1-phenyl-,ethyl ester (9CI); 2-Pyrazoline-3-carboxylic acid,4-[(p-carboxyphenyl)azo]-5-oxo-1-phenyl-, 3-ethyl 2-hydroxyethyl ester acetate(ester) (8CI); 1,2-Ethanediol, acetate, ester with ethyl4-[(p-carboxyphenyl)azo]-5-oxo-1-phenyl-2-pyrazoline-3-carboxylate (8CI)