You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-thia-4,9,11-triazatricyclo[6.4.0.02,6]dodeca-1(8),2(6),9-trien-12-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C8H7N3OS
assistant