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 2-thia-13-azapentacyclo[12.8.0.03,12.04,9.015,20]docosa-1(14),3(12),4,6,8,10,15,17,19,21-decaene .
user
C20H13NS
assistant