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system
Name the molecular formula for the molecule established as 9-[3-(3-cyanocarbazol-9-yl)phenyl]-6-spiro[3,13-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5,10,12-hexaene-8,9'-xanthene]-2'-ylcarbazole-3-carbonitrile using the IUPAC nomenclature.
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C55H30N6O
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