You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl (4R)-4-(2,3-dichlorophenyl)-6-methyl-2-methylsulfanyl-1,4-dihydropyrimidine-5-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C15H16Cl2N2O2S
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