You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[[3-[4-methyl-2-(10-phenylspiro[acridine-9,9'-fluorene]-2'-yl)cyclohexa-1,5-dien-1-yl]phenyl]methyl]-3-phenylaziridin-2-yl]-(4-phenylphenyl)methanimine is the IUPAC name of a molecule. Please give its molecular formula.
user
C66H51N3
assistant