You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,8,16-triazatetracyclo[7.7.0.02,6.010,15]hexadeca-1,4,6,8,10,12,14-heptaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H9N3
assistant