37833-24-2 4-25-00-03580 (Beilstein Handbook Reference) BRN 0319972 Butanoic acid, 4-((2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amino)-4-oxo- N-Antipyrinylsuccinamic acid Succinamic acid, N-antipyrinyl-