1,2-Diphenyl-4-((4-methyl-1-piperazinyl)methylene)-3,5-pyrazolidinedione 24665-84-7 3,5-Pyrazolidinedione, 1,2-diphenyl-4-((4-methyl-1-piperazinyl)methylene)- 5-25-15-00486 (Beilstein Handbook Reference) BRN 0703601