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 13-phenyl-12-phenylsulfanyl-10-thia-1,3,4,8-tetrazatricyclo[7.4.0.02,6]trideca-2(6),4,8-trien-7-one .
user
C20H16N4OS2
assistant