You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(9,9-dimethylfluoren-1-yl)phenyl]-N-(9,9-diphenylfluoren-4-yl)-9,9-dimethylfluoren-2-amine;N-[3-(9,9-dimethylfluoren-2-yl)phenyl]-N-(9,9-diphenylfluoren-4-yl)-9,9-dimethylfluoren-2-amine;N-(9,9-diphenylfluoren-4-yl)-9,9-dimethyl-N-[4-[4-(9-methylfluoren-9-yl)phenyl]phenyl]fluoren-2-amine;N-(9,9-diphenylfluoren-4-yl)-9,9-dimethyl-N-[4-[4-(9-phenylfluoren-9-yl)phenyl]phenyl]fluoren-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C259H194N4
assistant