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-[4-(3,4-difluorophenyl)piperidin-3-yl]-2-(oxan-4-yl)acetamide;hydrochloride is given. What is its corresponding molecular formula?
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C18H25ClF2N2O2
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