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Ethyl 2-[[[6-(2-amino-6-methoxy-7H-purin-9-ium-9-yl)-7-methyl-2-oxo-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-4-yl]methoxy-[(1-ethoxy-4-methyl-1-oxopentan-2-yl)amino]phosphoryl]amino]-4-methylpentanoate


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