You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-N-(4-chlorophenyl)-7-N,6-bis(4-methylphenyl)-1lambda4,2-dithia-4,6,8-triazabicyclo[3.3.0]octa-1(5),3,7-triene-3,7-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H20ClN5S2
assistant