You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-[3-[2,6-bis(2,3,4,5,6-pentadeuteriophenyl)phenyl]-2H-benzimidazol-3-ium-2-id-1-yl]-5-tert-butylphenoxy]-9-[4,5-bis(trideuteriomethyl)pyridin-2-yl]carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C54H44N4O
assistant