![1,4-Phthalazinedione, 2,3-dihydro-,bis[[1-(4-ethoxyphenyl)ethylidene]hydrazone]](/structure/139081-11-1.png)
1,4-Phthalazinedione, 2,3-dihydro-,bis[[1-(4-ethoxyphenyl)ethylidene]hydrazone]
![1,4-Phthalazinedione, 2,3-dihydro-,bis[[1-(4-ethoxyphenyl)ethylidene]hydrazone]](/structure/139081-11-1.png)
1,4-Phthalazinedione, 2,3-dihydro-,bis[[1-(4-ethoxyphenyl)ethylidene]hydrazone]

5-Phthalazinediazonium, 1,2,3,4-tetrahydro-1,4-dioxo-, chloride
![1-Phthalazinecarboxamide,3,4-dihydro-N-[2-[(2-hydroxy-3-phenoxypropyl)amino]ethyl]-4-thioxo-,monohydrochloride](/structure/89226-11-9.png)
![6-(ethylsulfanyl)-3-(4-methoxyphenyl)[1,2,4]triazolo[3,4-a]phthalazine](/structure/98123-78-5.png)
6-(ethylsulfanyl)-3-(4-methoxyphenyl)[1,2,4]triazolo[3,4-a]phthalazine



6-phthalazinecarboxylic acid, 1,2,3,4-tetrahydro-2,3-dimethyl-1,4-dioxo-
![1,4-bis[2-(3,4-diethoxybenzylidene)hydrazinyl]phthalazine](/structure/27704-11-6.png)

Phthalazine, 1,2,3,4-tetrahydro-1-phenyl-, monohydrochloride

![3-[2-(morpholin-4-yl)ethyl]-3,4,7,12-tetrahydro-1H-[1,2,5]triazepino[1,2-b]phthalazine-1,5(2H)-dione](/structure/81215-78-3.png)
3-[2-(morpholin-4-yl)ethyl]-3,4,7,12-tetrahydro-1H-[1,2,5]triazepino[1,2-b]phthalazine-1,5(2H)-dione

1,6-Phthalazinedicarboxylic acid,3,4-dihydro-7-methyl-3-(4-nitrophenyl)-4-oxo-, diethyl ester

![1(2H)-Phthalazinethione,7-[3-[(1,1-dimethylethyl)amino]-2-hydroxypropoxy]-, monohydrochloride](/structure/64223-78-5.png)
1(2H)-Phthalazinethione,7-[3-[(1,1-dimethylethyl)amino]-2-hydroxypropoxy]-, monohydrochloride


![3-(3-METHOXY-4-(PENTYLOXY)PHENYL)-6-(PYRROLIDIN-1-YL)-1,2,4-TRIAZOLO[3,4-A]PHTHALAZINE](/structure/87540-11-2.png)
3-(3-METHOXY-4-(PENTYLOXY)PHENYL)-6-(PYRROLIDIN-1-YL)-1,2,4-TRIAZOLO[3,4-A]PHTHALAZINE
![2,3-dihydro-1H,2'H,10bH-spiro[cyclopenta[4,5][1,3]oxazino[2,3-a]phthalazine-12,5'-pyrimidine]-1,2',4',6'(1'H,3'H)-tetrone](/structure/89385-11-5.png)

![Phthalazine, 1-(4-chlorophenyl)-4-[(4-methylphenyl)sulfonyl]-](/structure/863602-11-3.png)
Phthalazine, 1-(4-chlorophenyl)-4-[(4-methylphenyl)sulfonyl]-