You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name methyl 6-methyl-4-[5-methyl-4-[(2-methylphenyl)sulfanylmethyl]thiophen-2-yl]-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate into its molecular formula.
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C20H22N2O3S2
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