You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9,9,10-trimethyl-4-[10-spiro[cyclopentane-1,9'-fluorene]-1'-yl-8-(9,9,10-trimethylacridin-4-yl)anthracen-1-yl]acridine is the IUPAC name of a molecule. Please give its molecular formula.
user
C63H54N2
assistant