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Name the molecular formula for the molecule established as [(3aR,5R,6aR)-5-(hydroxymethyl)-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]pyrrol-4-yl]-[5-(4-methylphenyl)pyridin-3-yl]methanone using the IUPAC nomenclature.
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C20H22N2O3
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