![1'-cyclobutylspiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/403666.gif)
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![1'-(cyclopropanecarbonyl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/386779.gif)
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![1'-cyclopentylspiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/400707.gif)
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![1'-(1H-pyrazol-4-ylmethyl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/386668.gif)
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![1'-(4-pyrimidyl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/417021.gif)
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![1-(1H-imidazol-5-ylmethyl)spiro[4H-quinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/399020.gif)
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![1'-(2-cyclopropylacetyl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/396661.gif)
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![1'-cyclohexylspiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/405799.gif)
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![1'-(1H-pyrazole-4-carbonyl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/594858.gif)
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![1'-(tetrahydrofuran-3-carbonyl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/393488.gif)
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![1'-nicotinoylspiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/387717.gif)
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![1'-benzoylspiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/397102.gif)
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![1'-thieno[2,3-d]pyrimidin-4-ylspiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/389803.gif)
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![1'-(5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-4-yl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/530057.gif)
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![1'-(5H-thieno[3,2-b]pyrrole-5-carbonyl)spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/422088.gif)
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![1'-(cyclopropanecarbonyl)-1-(1,2,4-oxadiazol-5-ylmethyl)spiro[4H-quinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/393499.gif)
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![1'-[6-(3-piperidyl)pyrimidin-4-yl]spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/523828.gif)
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![1'-[6-(4-piperidyl)pyrimidin-4-yl]spiro[1,4-dihydroquinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/579434.gif)
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![1'-(cyclopentanecarbonyl)-1-(1H-imidazol-5-ylmethyl)spiro[4H-quinoxaline-3,4'-piperidine]-2-one](http://zinc12.docking.org/img/rings/392822.gif)
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