The safety, tolerability and antiviral activity of ANA598, administered orally twice daily for 3 days, will be compared to placebo in treatment-naïve subjects chronically infected with HCV genotype 1 infection. Thirty (30) subjects will be randomized to one of three cohorts described above. The ten patients in each cohort will be randomized 8 active: 2 placebo. At least 5 subjects with genotype 1a and 5 subjects with genotype 1b will be enrolled within each cohort.