You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-[[2-[6-amino-3,5-dicyano-4-(3-methyl-5-oxo-2H-oxadiazol-3-ium-4-yl)pyridin-2-yl]sulfanylacetyl]amino]-4-methylbenzoic acid .
user
C20H16N7O5S+
assistant