| 摘要 |
The invention is a compound, composition, use for and a method of treating Flaviviridae (Hepacivirus, Flavirius, Pestivirus) infections, including BVDV and HCV, or abnormal cellular proliferation, including malignant tumors, in a host including animals, and especially humans, using a beta-D or beta-L nucleoside of general formula (I)-(XX), or their pharmaceutically acceptable salt or prodrug thereof.
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