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-(3-aminobutyl)-2,2-dioxo-3,4-dihydropyrido[2,1-c][1,2,4]thiadiazine-7-carboxamide;hydrochloride is given. What is its corresponding molecular formula?
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C12H19ClN4O3S
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