1-Phenyl-4-methyl-3-pyrazolidone 2654-57-1 3-Pyrazolidinone, 4-methyl-1-phenyl- 4-Methyl-1-phenyl-3-pyrazolidinone 4-Methyl-1-phenyl-3-pyrazolidone AI3-60150 EINECS 220-180-6 NSC 96628 Phenidone B