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 2-[2-[[2-[(6-oxo-7,8,9,10-tetrahydrobenzo[c]chromen-3-yl)oxy]acetyl]amino]propanoylamino]propanoic acid is given. What is its corresponding molecular formula?
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C21H24N2O7
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