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Methyl (2S)-2-[[[(1S)-1-[(3aR,4R,6S,6aR)-4-(6-aminopurin-9-yl)-2-oxo-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]ethoxy]-phenoxyphosphoryl]amino]propanoate


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