You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(3-chloro-2-methyl-N-methylsulfonylanilino)-N-[(Z)-[3-(thietan-3-yloxy)phenyl]methylideneamino]acetamide into its molecular formula.
user
C20H22ClN3O4S2
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