You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(3R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-prop-2-ynoxy-3H-pyridine-2,6-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H14FNO6
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