There are disclosed novel prodrugs of 2′,3′-didehydro-2′,3′-dideoxynucleosides, for example, of 2′,3′-didehydro-2′,3′-dideoxythymidine. The prodrugs are hydrolyzable under physiological conditions to yield compound which are useful as antiviral agents, especially as agents effective against the human immunodeficiency viruses (HIV).  
                            公开了 2′,3′-二脱氢-2′,3′-二脱氧核苷的新型原药,例如 2′,3′-二脱氢-
2′,3′-二脱氧胸苷。这些原药在生理条件下可
水解,生成的化合物可用作抗病毒剂,尤其是对人类免疫缺陷病毒(HIV)有效的药物。