| 摘要 |
According to the present invention, provided are novel nucleoside derivatives having anti-viral activity, in particular, anti-HBV (anti-Hepatitis-B Virus) activity, represented by general formula (I), wherein R1 represents hydrogen, phosphate, phosphonate, alkyl or acyl, R2 represents alkoxy or halogen, R3 represents substituted or non-substituted pyrimidine or purine base, and X represents O, S, SO or SO2; pharmaceutically acceptable salts thereof, and processes for preparation thereof. As the compound (I) has two or more asymmetric carbon atoms, all possible stereoisomers and mixtures thereof are included in the scope of the present invention.
|
