(2R)-异丙基2-((((2R,3R,4R,5R)-5-(2,4-二氧代-3,4-二氢嘧啶-1(2H)- 基)-4-氟-3-羟基-4-甲基四氢呋喃-2-基)甲氧基)(苯氧基)磷酰基)氨基)丙酸乙酯, (2R)-Isopropyl 2-(((((2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)methoxy)(phenoxy)phosphoryl)amino)propanoate