You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-butan-2-yl-9-(2-ethylhexyl)carbazole;5-butan-2-yl-2-ethyl-3-methyl-1-(4-methylphenyl)indole;ethyl 4-[(3-butan-2-ylcarbazol-9-yl)methyl]benzoate;9-hexyl-3-[5-(2-methoxyethoxy)hexan-3-yl]carbazole;methane is the IUPAC name of a molecule. Please give its molecular formula.
user
C109H166N4O4
assistant