A pharmaceutical composition for treating an infection with a virus is disclosed. The pharmaceutical composition includes an effective amount of one or more coumarin compounds of formula (I):wherein R1, R2, R3, R4, R5, R6, and X are defined herein.本發明係有關於一種治療病毒感染的醫藥組成物,其包括:有效劑量之式(I)香豆素化合物:其中R1、R2、R3、R4、R5、R6及X如說明書所定義。