![2-phenyl-5H-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371122.gif)
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![N-cyclopropyl-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371143.gif)
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![5-(2-keto-2-pyrrolidino-ethyl)-2-phenyl-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371094.gif)
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![5-(2-keto-2-piperazino-ethyl)-2-phenyl-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371106.gif)
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![N-cyclopentyl-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371130.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3H-pyrazol-4-ylmethyl)acetamide](http://zinc12.docking.org/img/rings/371195.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3-pyridyl)acetamide](http://zinc12.docking.org/img/rings/371222.gif)
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![N-(2-furfuryl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371110.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-phenyl-acetamide](http://zinc12.docking.org/img/rings/371220.gif)
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![5-[2-(azepan-1-yl)-2-keto-ethyl]-2-phenyl-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371223.gif)
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![N-cyclohexyl-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371184.gif)
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![N-(1,1-diketothiolan-3-yl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371198.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-[2-(1H-pyrazol-4-yl)ethyl]acetamide](http://zinc12.docking.org/img/rings/371197.gif)
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![N-(2-isoxazol-4-ylethyl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371189.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(2-pyrrolidinoethyl)acetamide](http://zinc12.docking.org/img/rings/371206.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3-pyridylmethyl)acetamide](http://zinc12.docking.org/img/rings/371221.gif)
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![N-[2-(2-furyl)ethyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371192.gif)
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![N-benzyl-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371119.gif)
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![N-cycloheptyl-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371126.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(2-morpholinoethyl)acetamide](http://zinc12.docking.org/img/rings/371183.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(2-piperazinoethyl)acetamide](http://zinc12.docking.org/img/rings/371209.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(2-piperidinoethyl)acetamide](http://zinc12.docking.org/img/rings/371150.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3-pyrrolidinopropyl)acetamide](http://zinc12.docking.org/img/rings/371281.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-phenethyl-acetamide](http://zinc12.docking.org/img/rings/371124.gif)
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![N-(2-cyclohexen-1-ylethyl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371175.gif)
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![N-cyclooctyl-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371128.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(2-keto-2-piperidino-ethyl)acetamide](http://zinc12.docking.org/img/rings/371218.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3-morpholinopropyl)acetamide](http://zinc12.docking.org/img/rings/371291.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3-piperazinopropyl)acetamide](http://zinc12.docking.org/img/rings/371215.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3-piperidinopropyl)acetamide](http://zinc12.docking.org/img/rings/371202.gif)
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![N-[2-(azepan-1-yl)ethyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371282.gif)
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![N-[2-(cyclohexylamino)ethyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371216.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-(3-phenylpropyl)acetamide](http://zinc12.docking.org/img/rings/371139.gif)
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![N-(3-anilinopropyl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371285.gif)
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![N-[2-(benzylamino)ethyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371307.gif)
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![N-[3-(azepan-1-yl)propyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371204.gif)
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![N-[3-(cyclohexylamino)propyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371283.gif)
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![N-[3-(benzylamino)propyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371201.gif)
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![5-[2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-2-keto-ethyl]-2-phenyl-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371260.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-piperonyl-acetamide](http://zinc12.docking.org/img/rings/371228.gif)
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![N-(2,3-dihydro-1,4-benzodioxin-6-yl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371263.gif)
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![2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)-N-tetralin-1-yl-acetamide](http://zinc12.docking.org/img/rings/371165.gif)
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![N-(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371217.gif)
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![N-[3-(3,4-dihydro-1H-isoquinolin-2-yl)propyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371214.gif)
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![5-[2-keto-2-[4-(2-pyrimidyl)piperazino]ethyl]-2-phenyl-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371103.gif)
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![5-[2-keto-2-(4-phenylpiperazino)ethyl]-2-phenyl-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371092.gif)
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![5-[2-(4-benzylpiperidino)-2-keto-ethyl]-2-phenyl-pyrazolo[3,4-d]pyridazin-4-one](http://zinc12.docking.org/img/rings/371101.gif)
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![N-(1-benzyl-4-piperidyl)-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371266.gif)
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![N-[(1-benzyl-4-piperidyl)methyl]-2-(4-keto-2-phenyl-pyrazolo[3,4-d]pyridazin-5-yl)acetamide](http://zinc12.docking.org/img/rings/371212.gif)
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