You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-4,4-dioxo-3,5-dioxa-4lambda6-thia-1,9-diazabicyclo[4.2.1]nona-6(9),7-diene-7,8-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C5H8N4O4S
assistant