You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 5-amino-8-[5-(difluoromethyl)-6-oxo-1H-pyridin-3-yl]-2-(3-fluoropropyl)-7-phenyl-[1,2,4]triazolo[4,3-c]pyrimidin-6-ium-3-one into its molecular formula.
user
C20H18F3N6O2+
assistant