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 1-(6-methoxy-2-methyl-2,3-dihydro-1,4-benzothiazin-4-yl)-2-(methylamino)ethanone is given. What is its corresponding molecular formula?
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C13H18N2O2S
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