You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-[1-[4-(6-methylthieno[3,2-e]thiazin-2-yl)butyl]piperidin-4-yl]-1H-benzimidazol-2-one into molecular formula.
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C23H28N4OS2
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