![4-(2-furoyl)spiro[3-pyrroline-5,3'-indoline]-2,2'-quinone](http://zinc12.docking.org/img/rings/71583.gif)
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![4-(benzofuran-2-carbonyl)spiro[3-pyrroline-5,3'-indoline]-2,2'-quinone](http://zinc12.docking.org/img/rings/71495.gif)
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![4-(2,3-dihydro-1,4-benzodioxine-6-carbonyl)spiro[3-pyrroline-5,3'-indoline]-2,2'-quinone](http://zinc12.docking.org/img/rings/71448.gif)
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![4-(2-furoyl)-1-(3-morpholinopropyl)spiro[3-pyrroline-5,3'-indoline]-2,2'-quinone](http://zinc12.docking.org/img/rings/71430.gif)
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![4-(benzofuran-2-carbonyl)-1-(2-morpholinoethyl)spiro[3-pyrroline-5,3'-indoline]-2,2'-quinone](http://zinc12.docking.org/img/rings/71506.gif)
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![4-(benzofuran-2-carbonyl)-1-(3-morpholinopropyl)spiro[3-pyrroline-5,3'-indoline]-2,2'-quinone](http://zinc12.docking.org/img/rings/71531.gif)
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