You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-amino-N-[3-[(4-methyl-1,4-diazepan-1-yl)sulfonyl]phenyl]butanamide;dihydrochloride by IUPAC nomenclature, provide its molecular formula.
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C16H28Cl2N4O3S
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