You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 3-N'-phenanthren-9-yl-3-N',6-N',10-triphenyl-6-N'-(3-phenylphenyl)spiro[acridine-9,9'-fluorene]-3',6'-diamine is given. What is its corresponding molecular formula?
user
C69H47N3
assistant