You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[6-(9H-carbazol-1-yl)-4-(3,5-ditert-butylphenyl)pyridin-2-yl]dibenzofuran-4-yl]-N-phenylpyridin-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C54H46N4O
assistant