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 4-[[(2R,3S,5R)-3-(3,4-difluoro-2-methoxyphenyl)-5-methyl-5-(trifluoromethyl)oxolane-2-carbonyl]amino]pyridine-2-carboxylate is given. What is its corresponding molecular formula?
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C21H19F5N2O5
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