You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2,6-bis(3-phenylcarbazol-9-yl)-4-spiro[3,13-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5,10,12-hexaene-8,9'-fluorene]-3'-ylbenzonitrile into its molecular formula.
user
C66H39N5
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