You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by ethyl 2-(7,13-diaza-5-azoniatetracyclo[6.6.2.04,16.011,15]hexadeca-1(15),2,4(16),5,7,9,11-heptaen-13-yl)acetate;bromide ?
user
C17H16BrN3O2
assistant