You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4,9-di(carbazol-9-yl)-15-(9,9-dimethylfluoren-2-yl)-15-azatetracyclo[10.2.1.05,14.08,13]pentadeca-1(14),2,4,6,8,10,12-heptaene into molecular formula.
user
C53H35N3
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