Structural formula Business number 013J Molecular formula C19H20N2O2 Molecular weight 308.38 label phenylbutazone, 4-Butyl-1,2-diphenyl-3,5-pyrrolidinedione, Butanone, Butazolidine, Buteqian, Benzodizoline, 4-Butyl-1,2-diphenyl-3,5-pyrazolidinedione, Phenylbutazone Numbering system Physical property data Toxicological data Ecological data Molecular structure data Computing chemical data More Properties and Stability Storage method Synthesis method Purpose Numbering system CAS number:50-33-9 MDL number:MFCD00005500 EINECS number:200-029-0 RTECS number:UQ8225000 BRN...