6-Hydroxy-2-phenyl-3(2H)-pyridazinone

buttpark 417-18 ; phenylmaleichydrazide ; n-phenyl maleic acid hydrazine ; 2-phenyl-6-hydroxy-3-pyridazone ; 3-hydroxy-1-phenyl-6-pyridazone ; 2-phenyl-1h-pyridazine-3,6-dione ; 2-phenyl-1h-pyridazine-3,6-quinone ; 6-hydroxy-2-phenyl-3(2h)-pyridazinone ; 6-hydroxy-2-phenyl-3(2h)-pyridaxinone ; 6-hydroxy-2-phenylpyridazin-3(2h)-one ; buttpark 417-18