You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named methyl 4-(benzenesulfinylmethyl)-2-(2,6-dichloropyridin-4-yl)-5-ethyl-6-oxo-1-prop-2-ynyl-4H-pyrimidine-5-carboxylate is given. What is its corresponding molecular formula?
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C23H21Cl2N3O4S
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