You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 4-[2-[3-carbazol-9-yl-5-(1,2-dihydrocarbazol-9-yl)phenyl]-6-(9,9-dimethyl-7,8-dihydrofluoren-2-yl)pyrimidin-4-yl]phenol is given. What is its corresponding molecular formula?
user
C55H42N4O
assistant