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![6,7,8a,9-tetrahydro-5aH-[1,3]benzodioxolo[5,6-f]isoindole-5,8-quinone](http://zinc12.docking.org/img/rings/198106.gif)
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![3,4,5,12-tetrahydro-2H-benzimidazolo[2,1-b]quinazolin-1-one](http://zinc12.docking.org/img/rings/110904.gif)
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![3,4-dihydro-2H-benzimidazolo[2,1-b]quinazolin-1-one](http://zinc12.docking.org/img/rings/40395.gif)
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![7,8-dihydro-6H-[1,3]benzodioxolo[6,5-b]quinolin-9-one](http://zinc12.docking.org/img/rings/136835.gif)
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![2,3,4,7-tetrahydrobenzo[c]$b-carbolin-1-one](http://zinc12.docking.org/img/rings/1169.gif)
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![Spiro[BLAH-5,5'-cyclopent-2-ene]-1'-quinone](http://zinc12.docking.org/img/rings/169763.gif)
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![1,2,3,3a,3b,4,5,8,9,9a,9b,10,11,11a-tetradecahydrocyclopenta[i]phenanthridin-7-one](http://zinc12.docking.org/img/rings/68565.gif)
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![3,4-dihydro-2H-naphtho[2,3-b]benzofuran-1-one](http://zinc12.docking.org/img/rings/222535.gif)
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![4,5,5a,6,7,8,9,9a,9b,10-decahydro-3bH-naphtho[2,1-e]isobenzofuran-11-one](http://zinc12.docking.org/img/rings/350105.gif)
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![9,10-dihydro-8H-naphtho[1,2-b]benzofuran-7-one](http://zinc12.docking.org/img/rings/1193.gif)
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![1,2,3,4,5,6,10,11,12,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-7-one](http://zinc12.docking.org/img/rings/482502.gif)
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![1,2,3,4,5,6,7,10,12,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-11-one](http://zinc12.docking.org/img/rings/234645.gif)
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![1,2,3,4,5,6,7,8,10,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-12-one](http://zinc12.docking.org/img/rings/145338.gif)
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![1,2,3,4,5,9,10,11,12,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-6-one](http://zinc12.docking.org/img/rings/349952.gif)
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![1,2,3,4,8,9,10,11,12,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-7-one](http://zinc12.docking.org/img/rings/552667.gif)
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![1,2,6,7,10,11,12,13,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one](http://zinc12.docking.org/img/rings/14389.gif)
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![1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-3-one](http://zinc12.docking.org/img/rings/152.gif)
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![1,2,6,7,8,9,10,11,12,13,14,15-dodecahydrocyclopenta[a]phenanthren-3-one](http://zinc12.docking.org/img/rings/14365.gif)
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![1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one](http://zinc12.docking.org/img/rings/14222.gif)
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![1,2,6,7,8,9,10,13,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one](http://zinc12.docking.org/img/rings/516174.gif)
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![1,2,8,9,10,11,12,13,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one](http://zinc12.docking.org/img/rings/15242.gif)
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![4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-1-one](http://zinc12.docking.org/img/rings/446347.gif)
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![4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-3-one](http://zinc12.docking.org/img/rings/13297.gif)
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![7,8,9,11,12,13,14,15,16,17-decahydrocyclopenta[a]phenanthren-6-one](http://zinc12.docking.org/img/rings/464274.gif)
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![7,8,9,11,12,13,14,15-octahydrocyclopenta[a]phenanthren-6-one](http://zinc12.docking.org/img/rings/14370.gif)
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![6,7,8,10-tetrahydro-5H-indeno[1,2-b]quinoline-9,11-quinone](http://zinc12.docking.org/img/rings/119441.gif)
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![7,8,10,10a-tetrahydro-6H-indeno[1,2-b]quinoline-9,11-quinone](http://zinc12.docking.org/img/rings/133449.gif)
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![8,10,11,12-tetrahydro-7H-benzo[a][4,7]phenanthrolin-9-one](http://zinc12.docking.org/img/rings/3603.gif)
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![8,9,10,12-tetrahydro-7H-benzo[b][4,7]phenanthrolin-11-one](http://zinc12.docking.org/img/rings/101147.gif)
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![2,3,4,5,6,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-7,11-quinone](http://zinc12.docking.org/img/rings/285345.gif)
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![2,3,4,8,9,10,11,12,13,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-7,17-quinone](http://zinc12.docking.org/img/rings/510526.gif)
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![2,3,5,6-tetrahydro-1H-benzo[a]phenanthridin-4-one](http://zinc12.docking.org/img/rings/101139.gif)
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![2,4,5,6,7,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-3,11-quinone](http://zinc12.docking.org/img/rings/285347.gif)
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![2,6,7,8,9,10,11,12,13,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-3,17-quinone](http://zinc12.docking.org/img/rings/234941.gif)
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![2,6,7,8,9,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-3,11-quinone](http://zinc12.docking.org/img/rings/88270.gif)
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![2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-3,6-quinone](http://zinc12.docking.org/img/rings/145326.gif)
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![3,4,5,6-tetrahydro-2H-benzo[a]phenanthridin-1-one](http://zinc12.docking.org/img/rings/244356.gif)
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![5,6,7,8,9,10,11,12,13,17-decahydro-4H-cyclopenta[a]phenanthrene-3,16-quinone](http://zinc12.docking.org/img/rings/192494.gif)
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![5,6,7,8,9,10,12,13,14,15,16,17-dodecahydro-4H-cyclopenta[a]phenanthrene-3,11-quinone](http://zinc12.docking.org/img/rings/197547.gif)
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![6,8,9,10-tetrahydro-5H-benzo[c]phenanthridin-7-one](http://zinc12.docking.org/img/rings/222969.gif)
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![8,9,10,11,12,13,16,17-octahydro-4H-cyclopenta[a]phenanthrene-3,7-quinone](http://zinc12.docking.org/img/rings/349979.gif)
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![8,9,10,12-tetrahydro-7H-benzo[a]acridin-11-one](http://zinc12.docking.org/img/rings/256711.gif)
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![8,9,11,12,13,14,15,16-octahydro-7H-cyclopenta[a]phenanthrene-6,17-quinone](http://zinc12.docking.org/img/rings/225194.gif)
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