Coumarins hinged directly on benzimidazoles and their ribofuranosides to inhibit hepatitis C virus

Shwu Chen Tsay, Jih Ru Hwu, Raghunath Singha, Wen Chieh Huang, Yung Hsiung Chang, Ming Hua Hsu, Fa Kuen Shieh, Chun Cheng Lin, Kuo Chu Hwang, Jia Cherng Horng, Erik De Clercq, Inge Vliegen, Johan Neyts