You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-dibenzofuran-1-ylphenyl)-9,9-diphenyl-N-(4-phenylphenyl)spiro[anthracene-10,9'-fluorene]-2'-amine;N-(4-dibenzofuran-3-ylphenyl)-9,9-diphenyl-N-(4-phenylphenyl)spiro[anthracene-10,9'-fluorene]-2'-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C136H90N2O2
assistant