You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 6-[2,6-difluoro-4-(2-phenylethynyl)phenyl]-4-methyl-[1,3]thiazolo[4,5-d]pyrimidine-5,7-dione is given. What is its corresponding molecular formula?
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C20H11F2N3O2S
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