6-PHENYL-5-PIPERAZINO-3(2H)-PYRIDAZINONE

6-Phenyl-5-piperazin-1-yl-2H-pyridazin-3-one

6-Phenyl-5-(piperazin-1-yl)pyridazin-3(2H)-one

2,3-Dihydro-3-oxo-6-phenyl-5-(piperazin-1-yl)pyridazine, 1-(1,6-Dihydro-6-oxo-3-phenylpyridazin-4-yl)piperazine