(6Z)-6-[[2-[4-[2-[(Z)-(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]hydrazinyl]phthalazin-1-yl]hydrazinyl]methylidene]cyclohexa-2,4-dien-1-one

1-N,4-N-bis[(3-chlorophenyl)methylideneamino]phthalazine-1,4-diamine

1,4-bis(3,5-dimethylpyrazol-1-yl)phthalazine

6-(3,5-dimethylpyrazol-1-yl)-3-methyl-[1,2,4]triazolo[3,4-a]phthalazine