A number of compounds with direct activity are currently under clinical development, incl. BI 201335. BI 201335 works by preventing the Hepatitis C virus from replicating by binding to the HCV protease (enzyme). The main purpose of this clinical trial with BI 201335 is to see how well BI 201335 works and how safe BI 201335 is to use daily in combination with PegIFN and RBV in HCV infected patients