2-Pyrazolin-5-one, 4-((p-hydroxyanilino)methylene)-3-methyl-1-phenyl- 23711-41-3 4-((p-Hydroxyanilino)methylene)-3-methyl-1-phenyl-2-pyrazolin-5-one 5-25-14-00510 (Beilstein Handbook Reference) BRN 0889971