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What is the molecular formula of the compound with this IUPAC name 2'-carbazol-9-yl-5-[9-(5-carbazol-9-ylpyridin-3-yl)carbazol-3-yl]spiro[3,13-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5,10,12-hexaene-8,9'-xanthene] ?
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C64H38N6O
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