You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 5-(1,1-dideuterio-2,2-dimethylpropyl)-4-fluoro-2-(6-isocyano-3-methyl-9-phenyldibenzofuran-4-yl)-1-methylpyridin-1-ium .
user
C31H28FN2O+
assistant