You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
11,11-dimethyl-N-(1-naphthalen-2-ylnaphthalen-2-yl)-N-phenylbenzo[b]fluoren-3-amine;11,11-dimethyl-N-(1-naphthalen-2-ylnaphthalen-2-yl)-N-(2-phenylphenyl)benzo[b]fluoren-3-amine;11,11-dimethyl-N-(1-naphthalen-2-ylnaphthalen-2-yl)-N-(3-phenylphenyl)benzo[b]fluoren-3-amine;11,11-dimethyl-N-(1-naphthalen-2-ylnaphthalen-2-yl)-N-(4-phenylphenyl)benzo[b]fluoren-3-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C198H144N4
assistant