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Name the molecular formula for the molecule established as [2-(3-chloro-4-methylanilino)-2-oxoethyl] (2S)-2-[(1S,2S,6R,7S)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]decan-4-yl]propanoate using the IUPAC nomenclature.
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C21H23ClN2O5
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