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 N-[(1R)-1-[1-(2-morpholin-4-yl-2-oxoethyl)benzimidazol-2-yl]ethyl]furan-2-carboxamide is given. What is its corresponding molecular formula?
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C20H22N4O4
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