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 2-amino-5-[3-(azetidin-1-ium-3-yl)phenyl]-5-[4-(difluoromethoxy)-3-methylphenyl]-3-methylimidazol-1-ium-4-one .
user
C21H24F2N4O2+2
assistant