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system
Name the molecular formula for the molecule established as (3aR,6aR)-2-cyclopentyl-5-(2,4-difluorobenzoyl)-3,4,6,6a-tetrahydro-1H-pyrrolo[3,4-c]pyrrole-3a-carboxylic acid using the IUPAC nomenclature.
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C19H22F2N2O3
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