You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl [2-[4-[(2-butyl-5,6-dimethylbenzimidazol-1-yl)methyl]phenyl]phenyl] carbonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H36N2O3
assistant