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What is the molecular formula of the compound with this IUPAC name [2-[2-(4-bromobenzoyl)hydrazinyl]-2-oxoethyl] 3-[(1R,2R,6S,7R,8R,9S)-8,9-dibromo-3,5-dioxo-4-azatricyclo[5.2.1.02,6]decan-4-yl]propanoate ?
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C21H20Br3N3O6
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