You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2,3-dichlorophenyl) 2-[(3aR,7aR)-1,3-dioxo-3a,4,5,6,7,7a-hexahydroisoindol-2-yl]acetate by IUPAC nomenclature, provide its molecular formula.
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C16H15Cl2NO4
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