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 ethyl (2R)-2-[6-[(2,4-dimethylphenyl)carbamoyl]-5-methyl-4-oxothieno[2,3-d]pyrimidin-3-yl]butanoate is given. What is its corresponding molecular formula?
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C22H25N3O4S
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