You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3,6-ditert-butyl-9-[3-(3,6-ditert-butylcarbazol-9-yl)-2-isocyanodibenzothiophen-4-yl]carbazole into its molecular formula.
user
C53H53N3S
assistant