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Name the molecular formula for the molecule established as [2-(3-chloro-4-methylanilino)-2-oxoethyl] (2S)-2-[(1R,2S,6S,7R,8S,9S)-8,9-dibromo-3,5-dioxo-4-azatricyclo[5.2.1.02,6]decan-4-yl]propanoate using the IUPAC nomenclature.
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C21H21Br2ClN2O5
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