1-(4-chloro-2H-phthalazin-1-ylidene)naphthalen-2-one

1,4-bis(methylsulfanyl)phthalazine

1-chloro-4-methylthiophthalazine

tetrazolo[5,1-a]phthalazin-6-amine

6-ethoxytetrazolo[5,1-a]phthalazine