![3'-(1,2,4-oxadiazol-3-ylmethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/193813.gif)
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![3'-(thiazol-4-ylmethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/31372.gif)
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![3'-(2-pyrazol-1-ylethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/203509.gif)
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![3'-(4-pyridylmethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/249251.gif)
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![3'-(cyclohexylmethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/382511.gif)
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![3'-benzylspiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/365361.gif)
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![3'-[2-(1,3,4-thiadiazol-2-ylimino)ethyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/592311.gif)
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![3'-[2-keto-2-(2-thienyl)ethyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/233019.gif)
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![3'-phenethylspiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/614700.gif)
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![2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)-N-(1H-pyrazol-5-yl)acetamide](http://zinc12.docking.org/img/rings/593812.gif)
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![3'-(2-keto-2-piperidino-ethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/230864.gif)
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![3'-(2-phenoxyethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/84809.gif)
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![3'-phenacylspiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/79847.gif)
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![2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)-N-(2-thenyl)acetamide](http://zinc12.docking.org/img/rings/41135.gif)
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![N-cyclohexen-1-yl-2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)acetamide](http://zinc12.docking.org/img/rings/238810.gif)
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![N-cyclohexyl-2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)acetamide](http://zinc12.docking.org/img/rings/79845.gif)
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![3'-(3-phenoxypropyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/16735.gif)
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![N-cyclohexyl-3-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)propionamide](http://zinc12.docking.org/img/rings/124237.gif)
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![3'-[3-(benzylamino)propyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/183263.gif)
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![2-[[2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)acetyl]amino]-N-phenyl-acetamide](http://zinc12.docking.org/img/rings/258922.gif)
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![N-benzyl-2-[[2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)acetyl]amino]acetamide](http://zinc12.docking.org/img/rings/114157.gif)
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![3'-(imidazo[2,1-b]thiazol-6-ylmethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/362365.gif)
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![3'-(1H-benzimidazol-2-ylmethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/147184.gif)
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![3'-(8-quinolylmethyl)spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/145202.gif)
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![3'-[2-(benzofuran-2-yl)-2-keto-ethyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/233357.gif)
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![N-(1,3-benzothiazol-6-yl)-2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)acetamide](http://zinc12.docking.org/img/rings/143528.gif)
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![2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)-N-thiochroman-4-yl-acetamide](http://zinc12.docking.org/img/rings/107987.gif)
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![3'-[(5-cyclopropyl-1,2,4-oxadiazol-3-yl)methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/480188.gif)
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![3'-[[5-(2-furyl)-1,3,4-oxadiazol-2-yl]methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/113060.gif)
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![3'-[[5-(2-thienyl)-1,2,4-oxadiazol-3-yl]methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/193814.gif)
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![3'-[[2-(3-thienyl)thiazol-4-yl]methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/238227.gif)
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![3'-[[5-(2-thienyl)oxazol-2-yl]methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/519491.gif)
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![3'-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/112125.gif)
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![3'-[(2-phenylthiazol-4-yl)methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/142280.gif)
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![3'-[(5-benzyl-1,3,4-oxadiazol-2-yl)methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/362364.gif)
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![3'-[(2-benzylthiazol-4-yl)methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/193811.gif)
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![3'-[[2-(phenoxymethyl)thiazol-4-yl]methyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/193810.gif)
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![3'-[2-[[5-(2-thenylthio)-1,3,4-thiadiazol-2-yl]imino]ethyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/592282.gif)
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![3'-[2-keto-2-[4-(2-pyridyl)piperazino]ethyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/239258.gif)
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![3'-[2-keto-2-(4-phenylpiperazino)ethyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/87914.gif)
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![3'-[3-(piperidine-1-carbonyl)benzyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/365354.gif)
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![N-benzhydryl-2-(2',5'-diketospiro[chroman-4,4'-imidazolidine]-1'-yl)acetamide](http://zinc12.docking.org/img/rings/233240.gif)
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![3'-[2-keto-2-(2-phenyl-1H-indol-3-yl)ethyl]spiro[chroman-4,5'-imidazolidine]-2',4'-quinone](http://zinc12.docking.org/img/rings/236311.gif)
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