You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(9,9-dimethylfluoren-2-yl)-N-(4-phenylphenyl)spiro[fluorene-9,14'-tetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8,10,12,15,17-nonaene]-1-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C58H41N
assistant