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 2,21-dioxa-10,13-diazoniapentacyclo[11.8.0.01,10.03,8.015,20]henicosa-3(8),4,6,9,13,15,17,19-octaen-6-ylmethanol ?
user
C18H16N2O3+2
assistant