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 5-methyl-N-[2-(oxolan-2-ylmethylcarbamoyl)phenyl]imidazo[1,2-a]pyridine-2-carboxamide is given. What is its corresponding molecular formula?
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C21H22N4O3
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