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What is the molecular formula of the compound with this IUPAC name N-[3-(2-bromo-4,5-diethoxyphenyl)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d][1,3]thiazol-2-ylidene]pentanamide ?
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C20H27BrN2O5S2
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