You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 10-(3-chlorophenyl)sulfonyl-N-(4-ethylphenyl)-5-thia-1,8,11,12-tetrazatricyclo[7.3.0.02,6]dodeca-2(6),3,7,9,11-pentaen-7-amine ?
user
C21H16ClN5O2S2
assistant