You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5,7-dichloro-2,10-diazapentacyclo[12.3.1.112,16.02,11.04,9]nonadeca-4(9),5,7,10-tetraen-3-imine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H17Cl2N3
assistant