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 2-(4-benzylpiperazin-1-yl)-N-[1-(2-bicyclo[2.2.1]heptanyl)ethyl]-2-oxoacetamide is given. What is its corresponding molecular formula?
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C22H31N3O2
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