You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-(8-isocyano-3-methyl-6-phenyldibenzofuran-4-yl)-1,2,3-trimethyl-4-(2-methylpropyl)pyridin-1-ium is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H31N2O+
assistant