Medicament for treating human immunodeficiency virus.

摘要

Disclosed is a medicament for treating human immunodeficiency virus containing a novel nucleoside derivative. The nucleoside derivative has the formula (1-1) or (1-2): wherein A is a nitrogen atom-containing heterocyclic ring which is linked through nitrogen atom thereof; B is a hydrogen atom, a halogen atom, an azido group, an alkyl group, etc.