A method for treatment for HCV, comprising administering at least two direct acting antiviral agents (DAAs) to an HCV patient, wherein said treatment does not include administration of either interferon or ribavirin to said patient, and said treatment lasts for 4, 5, 6, 7, 8, 9, 10, 11 or 12 weeks, and wherein said at least two DAAs comprise (1) Compound 1 or a pharmaceutically acceptable salt thereof and (2) Compound 2 or a pharmaceutically acceptable salt thereof;
- or said at least two DAAs comprise (1) Compound 1 or a pharmaceutically acceptable salt thereof, (2) Compound 2 or a pharmaceutically acceptable salt thereof and (3) sofosbuvir;
- or said at least two DAAs comprise (1) Compound 2 or a pharmaceutically acceptable salt thereof and (2) sofosbuvir.