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Name the molecular formula for the molecule established as ethyl (2Z,5R)-5-(2-bromo-4,5-dimethoxyphenyl)-2-[(2,3-dimethoxyphenyl)methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate using the IUPAC nomenclature.
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C27H27BrN2O7S
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