You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[5-[3,5-bis(ethoxycarbonyl)-2,6-dimethyl-1,4-dihydropyridin-4-yl]furan-2-yl]-dioxidoazanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H21N2O7-
assistant