You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[3-chloro-6-(difluoromethyl)-2-fluorophenyl]-2-[(1S)-2-(4-fluorophenyl)-1-[4-(3-methyltriazol-4-yl)pyrazol-1-yl]ethyl]-1-oxidopyridin-1-ium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H19ClF4N6O
assistant