N-Benzoyl-N-(9-{3-[1-((2R,4S,5R)-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-yl]-prop-2-ynyl}-9H-purin-6-yl)-benzamide