![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(1H-pyrazol-3-yl)propionamide](http://zinc12.docking.org/img/rings/492516.gif)
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![1-cyclopropyl-3-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]urea](http://zinc12.docking.org/img/rings/373352.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-pyridyl)acetamide](http://zinc12.docking.org/img/rings/311079.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-thenyl)acetamide](http://zinc12.docking.org/img/rings/27560.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(4-pyridyl)acetamide](http://zinc12.docking.org/img/rings/502507.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(pyrrolidin-2-ylmethyl)acetamide](http://zinc12.docking.org/img/rings/359673.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(pyrrolidin-3-ylmethyl)acetamide](http://zinc12.docking.org/img/rings/314971.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetic Acid 4-piperidyl Ester](http://zinc12.docking.org/img/rings/589330.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetic Acid Tetrahydrofurfuryl Ester](http://zinc12.docking.org/img/rings/311078.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-thienyl)propionamide](http://zinc12.docking.org/img/rings/440936.gif)
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![3-(3-keto-3-piperazino-propyl)-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/39065.gif)
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![3-(3-keto-3-thiomorpholino-propyl)-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/425705.gif)
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![3-[2-(1,4-diazepan-1-yl)-2-keto-ethyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/343550.gif)
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![3-[2-keto-2-(4-ketopiperidino)ethyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/410583.gif)
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![3-[3-(pyrazin-2-ylamino)propyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/79371.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-phenyl-acetamide](http://zinc12.docking.org/img/rings/48772.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetic Acid Phenyl Ester](http://zinc12.docking.org/img/rings/91263.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionic Acid Cyclopentyl Ester](http://zinc12.docking.org/img/rings/386531.gif)
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![3-(3-keto-3-piperidino-propyl)-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/376156.gif)
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![3-[2-(azepan-1-yl)-2-keto-ethyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/310330.gif)
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![3-[2-keto-3-(2-pyridyl)propyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/534859.gif)
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![3-[3-(2-furfurylamino)propyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/467184.gif)
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![3-[3-(2-pyridylamino)propyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/466754.gif)
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![N-cyclohexyl-2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetamide](http://zinc12.docking.org/img/rings/233402.gif)
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![3-(3-phenoxypropyl)-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/16745.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-[(5-thioxo-1,4-dihydro-1,2,4-triazol-3-yl)methyl]acetamide](http://zinc12.docking.org/img/rings/305978.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(1,2,4-oxadiazol-3-ylmethyl)propionamide](http://zinc12.docking.org/img/rings/302804.gif)
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![3-[3-(1,1-diketo-1,2-thiazolidin-2-yl)-3-keto-propyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/416607.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(1,3,4-thiadiazol-2-yl)butyramide](http://zinc12.docking.org/img/rings/139935.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-keto-1H-pyridin-3-yl)acetamide](http://zinc12.docking.org/img/rings/595314.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(morpholin-2-ylmethyl)acetamide](http://zinc12.docking.org/img/rings/210129.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-[2-(1H-imidazol-2-yl)ethyl]acetamide](http://zinc12.docking.org/img/rings/160091.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(thiazol-4-ylmethyl)propionamide](http://zinc12.docking.org/img/rings/372036.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(1H-pyrazol-3-yl)butyramide](http://zinc12.docking.org/img/rings/462334.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-isoxazol-5-yl-butyramide](http://zinc12.docking.org/img/rings/433407.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-thiazol-2-yl-butyramide](http://zinc12.docking.org/img/rings/364239.gif)
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![N-cyclopropyl-2-[[2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetyl]amino]acetamide](http://zinc12.docking.org/img/rings/208992.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]isoxazole-3-carboxamide](http://zinc12.docking.org/img/rings/599992.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]isoxazole-4-carboxamide](http://zinc12.docking.org/img/rings/599766.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]thiazole-5-carboxamide](http://zinc12.docking.org/img/rings/605946.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-pyridylmethyl)acetamide](http://zinc12.docking.org/img/rings/615171.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(3-piperidylmethyl)acetamide](http://zinc12.docking.org/img/rings/346735.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-furfuryl)propionamide](http://zinc12.docking.org/img/rings/279832.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-pyridyl)propionamide](http://zinc12.docking.org/img/rings/352152.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(3-furfuryl)propionamide](http://zinc12.docking.org/img/rings/473308.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(3-pyridyl)propionamide](http://zinc12.docking.org/img/rings/5003.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(4-pyridyl)propionamide](http://zinc12.docking.org/img/rings/502433.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(pyrrolidin-3-ylmethyl)propionamide](http://zinc12.docking.org/img/rings/314975.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionic Acid 3-piperidyl Ester](http://zinc12.docking.org/img/rings/434085.gif)
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