The present invention discloses a novel 2-anilino-6-methylbenzothiazole derivative having the chemical formula (I), or a pharmaceutically acceptable salt, wherein the definition of each substituent is defined in the patent description and claims. This invention also discloses a method for preparing these derivatives as well as preparation of pharmaceutical chemicals for applications in treating hepatitis C.本發明揭示具有下列化學式(I)之新穎的2-苯胺基-6-甲基苯并噻唑衍生物(2-anilino-6-methylbenzothiazole derivatives):或者它的一藥學上可接受的鹽類,其中各個取代基的定義是如說明書與申請專利範圍中所界定者。本發明亦揭示此等衍生物的製備方法,以及它們在製備供用於治療C型肝炎的醫藥品上的用途。