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 N-[(4R)-3,4-dihydro-2H-chromen-4-yl]-2-[(4-methylphenyl)methylcarbamoylamino]acetamide is given. What is its corresponding molecular formula?
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C20H23N3O3
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