Adenosine, N-acetyl-N-[3-[1-[3-[(2-cyanophenyl)methyl]-1,2,3,6-tetrahydro-1-methyl-2,6-dioxo-4-pyrimidinyl]-3-piperidinyl]-2-propyn-1-yl]-, 2′,3′,5′-triacetate