You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-(9,9-dimethylspiro[anthracene-10,9'-fluorene]-2'-yl)-6-phenyl-2,6-dihydro-1H-pyrimidin-3-id-2-yl]benzonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C45H34N3-
assistant