You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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2-[(3-bromo-4-methylphenyl)methylidene]-5-(4-bromophenyl)-7-phenyl-5H-[1,3]thiazolo[3,2-a]pyrimidin-3-one is the IUPAC name of a molecule. Please give its molecular formula.
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C26H18Br2N2OS
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