You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(4-chloroanilino)-2-oxoethyl]-methyl-[(12-oxo-7-thia-9,11-diazatricyclo[6.4.0.02,6]dodeca-1(8),2(6),9-trien-10-yl)methyl]azanium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20ClN4O2S+
assistant