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 methyl 3-(2-methylsulfonylpyrimidin-4-yl)-2-[3-(trifluoromethyl)phenyl]imidazo[1,2-a]pyridine-8-carboxylate is given. What is its corresponding molecular formula?
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C21H15F3N4O4S
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