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system
Name the molecular formula for the molecule established as 5-amino-2-[(2R,5R)-3-amino-3-(2-chloroethynyl)-4-hydroxy-5-[(1S)-1-hydroxyethyl]oxolan-2-yl]-1,2,4-triazin-3-one using the IUPAC nomenclature.
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C11H14ClN5O4
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