You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-methyl-2-[4-[6-[4-(1-methylbenzimidazol-2-yl)phenyl]phenanthren-3-yl]phenyl]benzimidazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C42H30N4
assistant