You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(9,9-dimethylfluoren-2-yl)-21,21-dimethylhexacyclo[10.10.1.02,11.03,8.014,22.015,20]tricosa-1(22),2(11),3,5,7,9,12(23),13,15,17,19-undecaen-23-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C40H31N
assistant