Showing structure for [(2s,3r,4r,5s)-4-{[(2r,3s,4r,5r,6s)-6-[(acetyloxy)methyl]-3-hydroxy-4,5-bis(phosphonooxy)oxan-2-yl]oxy}-2-(6-aminopurin-9-yl)-5-(hydroxymethyl)oxolan-3-yl]oxyphosphonic acid