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 [4-(1-aminoethyl)piperidin-1-yl]-(7-fluoroquinoxalin-5-yl)methanone;dihydrochloride is given. What is its corresponding molecular formula?
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C16H21Cl2FN4O
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