You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 11-phenyl-6-(9-phenylcarbazol-2-yl)-19-oxa-2,9,11-triazapentacyclo[10.7.0.02,10.03,8.013,18]nonadeca-1(12),3(8),4,6,9,13,15,17-octaene by IUPAC nomenclature, provide its molecular formula.
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C39H24N4O
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