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Methyl 2-[[[(2R)-2-[(4-amino-2-oxopyrimidin-1-yl)methoxy]-2-[(4R)-5-methyl-2-oxo-1,3-dioxolan-4-yl]ethoxy]-[(1-methoxy-4-methyl-1-oxopentan-2-yl)amino]phosphoryl]amino]-4-methylpentanoate


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