You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 9-cyclohexa-1,3-dien-1-yl-N-cyclohexa-1,5-dien-1-yl-N,9-diphenylspiro[anthracene-10,9'-fluorene]-3'-amine into molecular formula.
user
C50H39N
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