

![7-[(2-fluorobenzyl)sulfanyl]-5,6-dihydro-4H-imidazo[4,5-d]pyridazine-4-thione](/structure/4099-25-6.png)
7-[(2-fluorobenzyl)sulfanyl]-5,6-dihydro-4H-imidazo[4,5-d]pyridazine-4-thione
![Pyrazolo[1,5-b]pyridazine, 2-(2-furanyl)-](/structure/88561-92-6.png)
![3,4-dimethyl-7-(4-nitrobenzyl)-2H-pyrazolo[3,4-d]pyridazine](/structure/63195-25-5.png)

3,6-Pyridazinedione,4,4,5-tribromotetrahydro-2-(4-iodophenyl)-1-methyl-

3-Pyridazinecarboxylic acid,6-amino-1-(3-bromophenyl)-1,4-dihydro-4-oxo-5-phenyl-
![1,2,4-TRIAZOLO[4,3-B]PYRIDAZINE,7-(ISOPROPYL)-](/structure/50357-92-1.png)
![3-Pyridazinecarboxamide,N-(2-cyanophenyl)-6-[4-[2-(trifluoromethyl)benzoyl]-1-piperazinyl]-](/structure/840492-25-3.png)
3-Pyridazinecarboxamide,N-(2-cyanophenyl)-6-[4-[2-(trifluoromethyl)benzoyl]-1-piperazinyl]-
![3-Pyridazinecarboxamide,N-(2-cyclopropylethyl)-6-[4-(2,2-dimethyl-1-oxobutyl)-1-piperazinyl]-](/structure/840490-25-7.png)
3-Pyridazinecarboxamide,N-(2-cyclopropylethyl)-6-[4-(2,2-dimethyl-1-oxobutyl)-1-piperazinyl]-
![1,2,4-Triazolo[4,3-b]pyridazine,6-(hexahydro-1H-azepin-1-yl)-3-[[(2-methoxyphenyl)thio]methyl]-](/structure/596824-92-9.png)
1,2,4-Triazolo[4,3-b]pyridazine,6-(hexahydro-1H-azepin-1-yl)-3-[[(2-methoxyphenyl)thio]methyl]-
![Pyridazine,3-[4-(1-methylethyl)-1-piperazinyl]-6-[4-(1-piperidinylmethyl)phenyl]-,2,2,2-trifluoroacetate (1:1)](/structure/919495-25-3.png)
![6H-Pyrrolo[3,4-d]pyridazine,1-(cyclopentylmethyl)-6-(4-ethoxyphenyl)-4,5,7-trimethyl-](/structure/647845-25-8.png)
6H-Pyrrolo[3,4-d]pyridazine,1-(cyclopentylmethyl)-6-(4-ethoxyphenyl)-4,5,7-trimethyl-
![3,6-Pyridazinedione, 1,2-dihydro-1-[(2-methylphenyl)methyl]-](/structure/87426-25-3.png)
3,6-Pyridazinedione, 1,2-dihydro-1-[(2-methylphenyl)methyl]-

![1,2,4-Triazolo[4,3-b]pyridazine, 3-(3-nitrophenyl)-6-(1-piperidinyl)-](/structure/596824-25-8.png)
1,2,4-Triazolo[4,3-b]pyridazine, 3-(3-nitrophenyl)-6-(1-piperidinyl)-

1(2H)-Pyridazinecarboxylic acid, 3,6-dihydro-, phenylmethyl ester
![2,3-dihydro[1,4]dithiino[2,3-d]pyridazine-5,8-diamine](/structure/57310-92-6.png)

![5,8:11,14-Diethenocyclododeca[d]pyridazine-1,4-dicarboxylic acid,dihydro-, dimethyl ester](/structure/142754-92-5.png)
5,8:11,14-Diethenocyclododeca[d]pyridazine-1,4-dicarboxylic acid,dihydro-, dimethyl ester

3-Pyridazinecarbonitrile,6-amino-1,4-dihydro-1-(2-methylphenyl)-4-oxo-5-phenyl-
![1H-Pyrrolo[2,3-d]pyridazine, 2,3-dihydro-1-methyl-4,7-diphenyl-](/structure/104739-25-5.png)
1H-Pyrrolo[2,3-d]pyridazine, 2,3-dihydro-1-methyl-4,7-diphenyl-
![Pyridazine, 3-(3-pyridinyl)-6-[4-(1-pyrrolidinyl)-1-piperidinyl]-](/structure/919495-92-4.png)
Pyridazine, 3-(3-pyridinyl)-6-[4-(1-pyrrolidinyl)-1-piperidinyl]-


![Tetrazolo[1,5-b]pyridazine, 6-[(phenylmethyl)sulfonyl]-](/structure/62645-25-4.png)
![1H-Pyrazolo[1,2-a]pyridazine-1,5(6H)-dione, tetrahydro-](/structure/36161-92-9.png)
![1,2,4-Triazolo[4,3-b]pyridazine, 6-ethoxy-7-methyl-](/structure/61262-25-7.png)
![6H-Imidazo[4,5-c]pyridazine-6-thione, 4-amino-1,5-dihydro- (9CI)](/structure/408314-25-0.png)
6H-Imidazo[4,5-c]pyridazine-6-thione, 4-amino-1,5-dihydro- (9CI)

![Pyrimido[4,5-d]pyridazine-8-carbonitrile,4-amino-2-ethoxy-5,6-dihydro-5-oxo-6-phenyl-](/structure/87831-25-2.png)
Pyrimido[4,5-d]pyridazine-8-carbonitrile,4-amino-2-ethoxy-5,6-dihydro-5-oxo-6-phenyl-
![1(6H)-Pyridazineundecanamide,N-[2-(1H-imidazol-5-yl)ethyl]-6-imino-3-phenyl-](/structure/921200-25-1.png)
1(6H)-Pyridazineundecanamide,N-[2-(1H-imidazol-5-yl)ethyl]-6-imino-3-phenyl-
![Pyridazine,3,6-dichloro-4-[4-[2-(2,6-dimethylphenoxy)ethyl]-1-piperazinyl]-](/structure/921769-25-7.png)
Pyridazine,3,6-dichloro-4-[4-[2-(2,6-dimethylphenoxy)ethyl]-1-piperazinyl]-

![6H-Pyrrolo[3,4-d]pyridazine,6-(4-ethoxy-2-nitrophenyl)-1,4,5,7-tetramethyl-, monohydrochloride](/structure/647845-92-9.png)
6H-Pyrrolo[3,4-d]pyridazine,6-(4-ethoxy-2-nitrophenyl)-1,4,5,7-tetramethyl-, monohydrochloride
![6H-Pyrrolo[3,4-d]pyridazine,6-(4-ethoxy-2-methoxyphenyl)-1,5,7-trimethyl-4-(4-morpholinyl)-](/structure/647847-25-4.png)
6H-Pyrrolo[3,4-d]pyridazine,6-(4-ethoxy-2-methoxyphenyl)-1,5,7-trimethyl-4-(4-morpholinyl)-

3-Pyridazinecarboxylic acid,1-(4-chlorophenyl)-1,4-dihydro-6-methyl-4-oxo-5-(1-oxopropyl)-