![3-(2-furfurylidene)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one](http://zinc12.docking.org/img/rings/196798.gif)
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![3-(2-thenylidene)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one](http://zinc12.docking.org/img/rings/196743.gif)
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![3-(3-thenylidene)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one](http://zinc12.docking.org/img/rings/196756.gif)
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![3-benzal-4-oxa-1-azabicyclo[3.2.0]heptan-7-one](http://zinc12.docking.org/img/rings/196722.gif)
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![3-(besylmethylene)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one](http://zinc12.docking.org/img/rings/196737.gif)
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![2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)-N-phenyl-acetamide](http://zinc12.docking.org/img/rings/196785.gif)
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![2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)acetic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196739.gif)
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![2-[2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)acetyl]oxyacetic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196792.gif)
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![2-[[2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)acetyl]amino]acetic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196757.gif)
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![3-(2-naphthylmethylene)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one](http://zinc12.docking.org/img/rings/196717.gif)
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![2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)-2-(2-thienyl)acetic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196809.gif)
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![2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)-2-(3-thienyl)acetic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196814.gif)
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![1-[(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)methyl]cyclohexa-2,4-diene-1-carboxylic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196735.gif)
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![2-[(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)methyl]benzoic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196802.gif)
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![4-[(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)methyl]benzoic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196749.gif)
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![1-[[[2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)acetyl]amino]methyl]cyclohexa-2,4-diene-1-carboxylic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196799.gif)
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![2-(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)malonic Acid Dibenzyl Ester](http://zinc12.docking.org/img/rings/196769.gif)
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![3-(2-benzoxy-2-keto-ethylidene)-7-keto-4-oxa-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196783.gif)
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![4-benzoxy-1-[(7-keto-4-oxa-1-azabicyclo[3.2.0]heptan-3-ylidene)methyl]cyclohexa-2,4-diene-1-carboxylic Acid Benzyl Ester](http://zinc12.docking.org/img/rings/196800.gif)
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