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 5-[4-(dimethylamino)phenyl]-7-methyl-2-[(4-methylphenyl)methylidene]-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C26H27N3O3S
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