| (2s)-4-[1-[(2r,3r,4s,5r)-5-[[[[(2r,3s,4r,5r)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-tetrahydrofuran-2-yl]methoxy-hydroxy-phosphoryl]oxy-hydroxy-phosphoryl]oxymethyl]-3,4-dihydroxy-tetrahydrofuran-2-yl]-5-carbamoyl-pyridin-1-ium-3-yl]-2-hydroxy-butanoic acid |
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