You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 9,9-dimethyl-N,N-diphenyl-7-(9-phenyl-9-azahexacyclo[13.6.2.02,10.03,8.012,22.019,23]tricosa-1(22),2(10),3,5,7,11,13,15,17,19(23),20-undecaen-16-yl)fluoren-2-amine by IUPAC nomenclature, provide its molecular formula.
user
C55H38N2
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