You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[cyano-[2-[cyano-(4-cyano-2,3,5,6-tetrafluorophenyl)methylidene]-3-[cyano-(4-ethynyl-2,3,5,6-tetrafluorophenyl)methylidene]cyclopropylidene]methyl]-2,3,5,6-tetrafluorobenzonitrile;4-[13-(3-cyano-4-ethynylphenyl)-5,7,12,14-tetraoxo-6,13-diazatetracyclo[6.6.2.04,16.011,15]hexadeca-1(15),2,4(16),8,10-pentaen-6-yl]benzene-1,2-dicarbonitrile;7-(2-cyano-3-ethynylpyrazino[2,3-b]quinoxalin-7-yl)pyrazino[2,3-b]quinoxaline-2,3-dicarbonitrile;2-[5-(dicyanomethylidene)-2,3,7-tris(4-fluorophenyl)-8-(4-methylphenyl)pyrazino[2,3-g]quinoxalin-10-ylidene]propanedinitrile;6-[4-(1,1-difluoroethyl)phenyl]-4,8-bis(trifluoromethyl)-2-[4-(trifluoromethyl)phenyl]pyrrolo[3,4-f]isoindole-1,3,5,7-tetrone The above is the IUPAC name of a molecule. Write its molecular formula.
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C155H49F26N31O8
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