You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(2S,3S,4R)-5-(5-ethynyl-2,4-dioxopyrimidin-1-yl)-2-fluoro-3,4-dihydroxyoxolan-2-yl]methyl (2S)-2-amino-3-methylbutanoate by IUPAC nomenclature, provide its molecular formula.
user
C16H20FN3O7
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