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 (3S,3aS,6aR)-2-(5-ethyl-1-benzofuran-3-carbonyl)-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrole-3-carboxamide is given. What is its corresponding molecular formula?
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C19H22N2O3
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