You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-tert-butyl-2-[3-[5-tert-butyl-3-[3-tert-butyl-5-(2-phenylpropan-2-yl)phenyl]-2H-benzimidazol-1-yl]-5-(2-phenylpropan-2-yl)phenoxy]-9-(4-tert-butylpyridin-2-yl)carbazole by IUPAC nomenclature, provide its molecular formula.
user
C70H78N4O
assistant