You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-ethenyl-2,9-diazatricyclo[6.3.1.04,12]dodeca-1(11),4(12),5,7,9-pentaen-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H8N2O
assistant