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Ethyl (2S)-2-[[[(3aR,4R,6R,6aS)-4-(2,6-diaminopurin-9-yl)-3a-methyl-2-oxo-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-6-yl]methoxy-[2-(3-ethoxy-3-oxopropyl)phenoxy]phosphoryl]amino]propanoate


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