You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2E)-2-[(3-bromo-4-methoxyphenyl)methylidene]-3-oxo-1,4-benzothiazin-4-yl]-N-(2,3-dimethylcyclohexyl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H29BrN2O3S
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