NOVEL OPTICALLY ACTIVE NUCLEOSIDE DERIVATIVE, ITS MANUFACTURING METHOD AND ANTI-HBV AGENT CONTAINING THE DERIVATIVE THEREOF

摘要

This invention relates to a novel optically active nucleoside derivative expressed by formula (1), its manufacturing method and anti-HBV agent containing the derivative wherein R1 is hydrogen, phosphate, alkyl or acyl group; R2 is substituted or non-substituted pyrimidine or purine base.