You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4,10,15-triazapentacyclo[12.8.0.03,12.05,10.016,21]docosa-1(14),2,4,6,8,12,16,18,20-nonaene-11,22-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H11N3O2
assistant