You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5'-benzyl-10-phenyl-3'-(4-phenylphenyl)spiro[acridine-9,9'-fluorene];ethane;1-methyl-4-phenylbenzene is the IUPAC name of a molecule. Please give its molecular formula.
user
C65H53N
assistant