You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[(3-cyano-4,6-dimethyl-2-oxopyridin-1-yl)carbamothioyl]-3-(3-methylbutoxy)benzamide is given. What is its corresponding molecular formula?
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C21H24N4O3S
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