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system
Name the molecular formula for the molecule established as 8b-[(4-chlorophenyl)methyl]-6-(1,1,1,2-tetrafluoropropan-2-yl)-2,3,3a,4-tetrahydro-1H-indeno[2,1-b]pyrrole using the IUPAC nomenclature.
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C21H20ClF4N
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