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![Dipyrazino[2,3-f:2'',3''-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile](https://www.sigmaaldrich.com/content/dam/sigma-aldrich/structure6/010/mfcd19689401.eps/_jcr_content/renditions/mfcd19689401-large.png)