You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 7-thia-3,10,20-triazapentacyclo[10.8.0.02,10.04,8.014,19]icosa-1(20),2,4(8),5,12,14,16,18-octaen-9-one .
user
C16H9N3OS
assistant