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system
What is the molecular formula of the molecule tetrasodium;[[[(2R,4S,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methoxy-oxidophosphoryl]oxy-oxidophosphoryl] phosphate ?
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C11H13FN5Na4O13P3
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