You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-dibenzofuran-1-yl-N-[4-(9,9-dimethylspiro[anthracene-10,9'-fluorene]-2'-yl)phenyl]dibenzofuran-3-amine ?
user
C58H39NO2
assistant