You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[amino-(4-methylsulfonylphenyl)-oxo-lambda6-sulfanylidene]-3-[4-cyano-2,6-di(propan-2-yl)phenyl]urea into its molecular formula.
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C21H26N4O4S2
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