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system
Name the molecular formula for the molecule established as [(2R)-1-[4-[(4-fluoro-2-methyl-1H-indol-5-yl)oxy]-5-methylpyrrolo[2,1-f][1,2,4]triazin-6-yl]oxypropan-2-yl] dihydrogen phosphate using the IUPAC nomenclature.
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C19H20FN4O6P
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