Inhibitors of HCV of formula (I). and the N-oxides, salts, and stereoisomers thereof, wherein the dashed line represents an optional double bond between atoms C7 and C8; R1 is hydrogen or C1-6alkyl; R2 is hydrogen or C1-6alkyl; and n is 3, 4, 5, or 6; pharmaceutical compositions containing compounds (I) and processes for preparing compounds (I) are provided. Bioavailable combinations of the inhibitors of HCV of formula (I) with ritonavir are also provided.