You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule methyl 2-[[2-[(1,1-dioxothiolan-3-yl)-prop-2-ynylamino]acetyl]amino]-6-methyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate into molecular formula.
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C20H26N2O5S2
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