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![Structure of 2-(6,7-difluoro-3-oxo-2,3-dihydro-1H-cyclopenta[b]naphthalen-1-ylidene)malononitrile CAS OPVNA-0001](https://www.watson-int.com/wp-content/uploads/2020/03/Structure-of-2-67-difluoro-3-oxo-23-dihydro-1H-cyclopentabnaphthalen-1-ylidenemalononitrile-CAS-OPVNA-0001.png "Structure of 2-(6,7-difluoro-3-oxo-2,3-dihydro-1H-cyclopenta[b]naphthalen-1-ylidene)malononitrile <span class=\"caps\">CAS</span> <span class=\"caps\">OPVNA-0001</span>")
![Structure of Anthra[2,1,9-def6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone CAS 112100-07-9](https://www.watson-int.com/wp-content/uploads/2018/11/Structure-of-Anthra219-def6510-defdiisoquinoline-138102H9H-tetrone-CAS-112100-07-9.gif "Structure of Anthra[2,1,9-def6,5,10-d’e’f’]diisoquinoline-1,3,8,10(<span class=\"caps\">2H</span>,<span class=\"caps\">9H</span>)-tetrone <span class=\"caps\">CAS</span> 112100-07-9")
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