You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-bromo-2-phenylbenzene;9-(4-bromophenyl)-9-phenylfluorene;(R)-(4-bromophenyl)-phenylmethanol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C50H37Br3O
assistant