Synonyms: Antipyrine,4-isopropyl- (6CI,7CI,8CI);1,2-Dihydro-1,5-dimethyl-2-phenyl-4-isopropyl-3H-pyrazol-3-one;1-Phenyl-2,3-dimethyl-4-isopropyl-3-pyrazolin-5-one;1-Phenyl-2,3-dimethyl-4-isopropylpyrazol-5-one;4-Isopropyl-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one;4-Isopropylantipyrine;4-Isopropylphenazone;Arantil P;Budirol;Causyth;Cibalgina;Eufibron;Isopropchin;Isopropylantipyrin;Isopropylantipyrine;Isopropylphenazone;Isopropyrine;Larodon;