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 methyl (2R,3R)-2-[[2-[2-(5,6-dimethyl-1-benzofuran-3-yl)acetyl]oxyacetyl]amino]-3-methylpentanoate is given. What is its corresponding molecular formula?
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C21H27NO6
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