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 (2Z,5R)-2-[(3-bromo-2-hydroxy-5-nitrophenyl)methylidene]-7-methyl-3-oxo-5-(4-prop-2-enoxyphenyl)-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C26H22BrN3O7S
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