You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3,5-dimethoxyphenyl)-6,7-difluoro-3-methyl-1,4-dioxidoquinoxaline-1,4-diium-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H15F2N3O4
assistant