(2r,3s,4r,5r)-5-(2-amino-6-oxo-3,6-dihydro-9h-purin-9-yl)-2-({[{[(2r,3s,4r,5r)-5-(4-amino-2-oxopyrimidin-1(2h)-yl)-2-({[{[(2r,3s,4s,5s)-5-[1-(2-cyanoethyl)-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl]-4-hydroxy-2-{[(hydroxy{[(2r,3s,4r,5r)-4-hydroxy-2-(hydr |
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