You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[(3aR,7aR)-2-[(2-chloro-6-fluorophenyl)methyl]-3a-(hydroxymethyl)-1,3,4,6,7,7a-hexahydropyrrolo[3,4-c]pyridin-5-yl]ethanone by IUPAC nomenclature, provide its molecular formula.
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C17H22ClFN2O2
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