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 4-(6-chloro-3,4-dihydro-2H-1,5-benzodioxepine-8-carbonyl)piperazine-1-carboxylate is given. What is its corresponding molecular formula?
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C17H21ClN2O5
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