((3aR,4R,6R,6aR)–6–(6–Amino–9H–purin–9–yl)–2,2–dimethyltetrahydrofuro(3,4–d)(1,3)dioxol–4–yl)methyl((R)–2–((tert–butoxycarbonyl)amino)–5–oxo–5–(tritylamino)pentanoyl)sulfamate

((3aR,4R,6R,6aR)–6–(6–Amino–9H–purin–9–yl)–2,2–dimethyltetrahydrofuro(3,4–d)(1,3)dioxol–4–yl)methyl((R)–2–((tert–butoxycarbonyl)amino)–5–oxo–5–(tritylamino)pentanoyl)sulfamate