You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (1aS,3aR,7aR,7bR)-1,3a,4,5,6,7,7a,7b-octahydrocyclopropa[a]naphthalene-1a,2-dicarbaldehyde by IUPAC nomenclature, provide its molecular formula.
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C13H16O2
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