You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-fluoro-2-[6-isocyano-3-methyl-9-(trideuteriomethyl)dibenzofuran-4-yl]-1-methyl-5-(trideuteriomethyl)pyridin-1-ium .
user
C22H18FN2O+
assistant