You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(3-cyano-1,2,4-oxadiazol-5-yl)-2-oxido-1,2,5-oxadiazol-2-ium-3-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C6N6O3
assistant