A novel derivative of 1-β-D-arabinofuranosyl-(E)-5-(2-halogenovinyl)uracil represented by general formula (1), which can remain in the blood at a high concentration for long when orally administered; an antiviral drug containing the same as an active ingredient; and a method of treating viral infections by administering a safe and effective dose of the same to a patient with a viral infection, wherein X represents halogen and R¹ to R³ may be the same or different from one another and each represents hydrogen, lower alkyl or aralkyl, provide that the case where all of R¹, R² and R³ are hydrogen atoms at the same time is excluded.
一种通式(1)表示的1-β-D-阿拉伯
呋喃糖基-(E)-5-(2-卤代
乙烯基)
脲嘧啶的新型衍
生物,口服给药时可在血液中长期保持高浓度;一种抗病毒药物,其活性成分含有上述衍
生物;以及一种治疗病毒感染的方法,方法是向病毒感染患者施用安全有效剂量的抗病毒药物,其中X代表卤素,R¹至R³可以相同或不同,各自代表
氢、低级烷基或芳烷基,但不包括R¹、R²和R³同时全部为
氢原子的情况。