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 2-[[2-[(4R)-4-(2-methylsulfonylethyl)-2,5-dioxoimidazolidin-1-yl]acetyl]amino]-4-phenylthiophene-3-carboxylate is given. What is its corresponding molecular formula?
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C21H23N3O7S2
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