You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 6,9-dimethyl-7-sulfanylidene-6,8,11-triazapentacyclo[10.8.0.02,10.04,8.015,20]icosa-1(12),2(10),13,15,17,19-hexaen-5-one .
user
C19H17N3OS
assistant