You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[[3-(4-chlorophenyl)-1H-pyrazol-5-yl]methyl]-2-(2,3-difluorophenyl)-3H-imidazo[4,5-c]pyridin-5-ium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H15ClF2N5+
assistant