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-(1,3-benzodioxol-5-yl)-2-[(4S)-4-(4-chlorophenyl)-2,5-dioxo-4,7-dihydro-3H-furo[3,4-d]pyrimidin-1-yl]acetamide is given. What is its corresponding molecular formula?
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C21H16ClN3O6
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