You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl (2E,5S)-2-[[2-bromo-4-(cyanomethoxy)-5-methoxyphenyl]methylidene]-7-methyl-5-(4-methylphenyl)-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C27H24BrN3O5S
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