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 [2-(cyclohexylamino)-2-oxoethyl] 2-[(2S)-3-oxo-4H-1,4-benzothiazin-2-yl]acetate is given. What is its corresponding molecular formula?
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C18H22N2O4S
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