It is found out that compounds represented by the formula (I):
1
wherein R
1
is an optionally substituted carbocyclic group or an optionally substituted heterocyclic group; and R
2
and R
3
taken together with the adjacent carbon atom form an optionally substituted heterocyclic group having one or more of oxo and/or thioxo; have an HCV RNA-dependent RNA synthase inhibitory effect.
已发现由以下式表示的化合物(I)具有HCV RNA依赖的RNA合成酶抑制作用:其中R1是可选择地取代的碳环基团或可选择地取代的杂环基团;而R2和R3与相邻的碳原子结合形成一个含有一个或多个氧代和/或
硫代的可选择地取代的杂环基团。