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-[(6-ethyl-7-hydroxy-4-methyl-2-oxochromen-8-yl)methyl-methylamino]-N-propylacetamide is given. What is its corresponding molecular formula?
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C19H26N2O4
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