You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-chloro-8,11,11-trimethyl-4-(pyridin-4-ylmethyl)-1,3,4,8,10-pentazatricyclo[7.3.0.02,6]dodeca-2,5,9-trien-7-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H17ClN6O
assistant