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 1-[(2R,5S)-5-(hydroxymethyl)oxolan-2-yl]-5-[(E)-2-(4-methoxyphenyl)ethenyl]pyrimidine-2,4-dione is given. What is its corresponding molecular formula?
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C18H20N2O5
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