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-[[2-(methoxymethyl)piperidin-4-yl]methyl]indol-3-yl]-4-(6H-thieno[2,3-b]pyrrol-4-yl)pyrrole-2,5-dione into molecular formula.
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C26H26N4O3S
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