Name: (2R,3S,4R,5R)-4-AMINO-2-[[(2R,3S,4R,5R)-4-AMINO-5-(4-AMINO-2-OXO-PYRI MIDIN-1-YL)-3-PHOSPHONOOXY-OXOLAN-2-YL]METHOXYMETHYL]-5-(2-AMINO-6-OXO -3H-PURIN