You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[4-[1-[(5-fluoropyridine-3-carbonyl)amino]-2-(oxolan-2-yl)ethyl]triazol-1-yl]pyridine-3-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H19FN6O4
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