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What is the molecular formula of the molecule propan-2-yl (3S)-4-[[(2R,4aR,6R,7R,7aS)-7-amino-6-(2,4-dioxopyrimidin-1-yl)-7-methyl-2-oxo-4,4a,6,7a-tetrahydrofuro[3,2-d][1,3,2]dioxaphosphinin-2-yl]oxy]-3-acetyloxybutanoate ?
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C19H28N3O11P
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