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 ethyl (4aS,7aR)-1-methyl-3,4,5,6,7,7a-hexahydro-2H-cyclopenta[b]pyridine-4a-carboxylate is given. What is its corresponding molecular formula?
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C12H21NO2
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