![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-phenethyl-acetamide](http://zinc12.docking.org/img/rings/243219.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/207247.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionic Acid Cyclohex-3-en-1-ylmethyl Ester](http://zinc12.docking.org/img/rings/433606.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionic Acid Cyclohexylmethyl Ester](http://zinc12.docking.org/img/rings/376144.gif)
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![3-[4-(azepan-1-yl)-4-keto-butyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/309456.gif)
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![3-[4-keto-5-(2-pyridyl)pentyl]-1,3-diazaspiro[4.4]nonane-2,4-quinone](http://zinc12.docking.org/img/rings/534786.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-phenyl-butyramide](http://zinc12.docking.org/img/rings/82082.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)butyric Acid Cyclohexyl Ester](http://zinc12.docking.org/img/rings/371838.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)butyric Acid Phenyl Ester](http://zinc12.docking.org/img/rings/151214.gif)
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![N-(2-cyclohexylethyl)-2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetamide](http://zinc12.docking.org/img/rings/355012.gif)
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![N-(cyclohexylmethyl)-3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionamide](http://zinc12.docking.org/img/rings/457586.gif)
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![N-benzyl-3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionamide](http://zinc12.docking.org/img/rings/119981.gif)
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![N-cyclohexyl-4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)butyramide](http://zinc12.docking.org/img/rings/341453.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]benzamide](http://zinc12.docking.org/img/rings/151770.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(1,2,4-oxadiazol-5-ylmethyl)urea](http://zinc12.docking.org/img/rings/426719.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-[2-(5-thioxo-1,4-dihydro-1,2,4-triazol-3-yl)ethyl]propionamide](http://zinc12.docking.org/img/rings/472087.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-[(5-thioxo-1,4-dihydro-1,2,4-triazol-3-yl)methyl]butyramide](http://zinc12.docking.org/img/rings/310458.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(1H-pyrazol-4-ylmethyl)urea](http://zinc12.docking.org/img/rings/155465.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(thiazol-2-ylmethyl)urea](http://zinc12.docking.org/img/rings/331461.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(thiazol-4-ylmethyl)urea](http://zinc12.docking.org/img/rings/588747.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(thiazol-5-ylmethyl)urea](http://zinc12.docking.org/img/rings/525908.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-[3-(1,2,4-oxadiazol-5-yl)propyl]propionamide](http://zinc12.docking.org/img/rings/342775.gif)
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![N'-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propanoyl]-3-furohydrazide](http://zinc12.docking.org/img/rings/220658.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(2-furfuryl)urea](http://zinc12.docking.org/img/rings/274625.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(2-thenyl)urea](http://zinc12.docking.org/img/rings/151173.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(3-furfuryl)urea](http://zinc12.docking.org/img/rings/403273.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(3-piperidyl)urea](http://zinc12.docking.org/img/rings/245565.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(4-piperidyl)urea](http://zinc12.docking.org/img/rings/486367.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-piperazinoethyl)propionamide](http://zinc12.docking.org/img/rings/205459.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propionic Acid 3-(1H-pyrazol-4-yl)propyl Ester](http://zinc12.docking.org/img/rings/358026.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(morpholin-2-ylmethyl)butyramide](http://zinc12.docking.org/img/rings/279867.gif)
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![N'-[2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetyl]benzohydrazide](http://zinc12.docking.org/img/rings/111737.gif)
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![N-[2-(cyclopropylamino)-2-keto-ethyl]-4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)butyramide](http://zinc12.docking.org/img/rings/209020.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-1,4-diazepane-1-carboxamide](http://zinc12.docking.org/img/rings/426724.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(1H-pyrazol-4-yl)acrylamide](http://zinc12.docking.org/img/rings/579686.gif)
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![1-cyclohexyl-3-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]urea](http://zinc12.docking.org/img/rings/106451.gif)
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![1-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-phenyl-urea](http://zinc12.docking.org/img/rings/102494.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-phenoxyethyl)acetamide](http://zinc12.docking.org/img/rings/434101.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetic Acid 2-phenoxyethyl Ester](http://zinc12.docking.org/img/rings/302781.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetic Acid Phenacyl Ester](http://zinc12.docking.org/img/rings/110122.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(2-piperidinoethyl)propionamide](http://zinc12.docking.org/img/rings/202455.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(3-pyrrolidinopropyl)propionamide](http://zinc12.docking.org/img/rings/467010.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(3-piperidylmethyl)butyramide](http://zinc12.docking.org/img/rings/287789.gif)
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![4-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(3-pyridylmethyl)butyramide](http://zinc12.docking.org/img/rings/345615.gif)
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![N-[2-(cyclohexylamino)ethyl]-2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetamide](http://zinc12.docking.org/img/rings/251996.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]-3-(3-thienyl)acrylamide](http://zinc12.docking.org/img/rings/589897.gif)
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![N-[3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)propyl]azepane-1-carboxamide](http://zinc12.docking.org/img/rings/238787.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-(3-phenylpropyl)acetamide](http://zinc12.docking.org/img/rings/292654.gif)
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![2-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)acetic Acid 3-phenylpropyl Ester](http://zinc12.docking.org/img/rings/350486.gif)
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![3-(2,4-diketo-1,3-diazaspiro[4.4]nonan-3-yl)-N-phenethyl-propionamide](http://zinc12.docking.org/img/rings/108799.gif)
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