Synonyms:
1,2h-phthalazone ; ptlz ; dj-1461 ; budralazine ; 1,3-dihydro-4-keto-2 3-benzodiazine ; buterazine ; 1,2-dihydrophthalazin-1-one ; dihydrooxophthalazine ; 4-methyl-3-penten-2-one (phthalazin-1-yl)hydrazone ; 4-methyl-3-penten-2-one 2-(1-phthalazinyl)hydrazone