The present inventon provides the following compounds having anti-viral activity.A1 is CR1AR1B, S or O； A2 is CR2AR2B, S or O； A3 is CR3AR3B, S or O； A4 is CR4AR4B, S or O； the number of hetero atoms among atoms constituting the ring which consists of A1, A2, A3, A4, nitrogen atom adjacent to A1 and carbon atom adjacent to A1, is 1 or 2； R1A and R1B are each independently hydrogen, halogen, alkyl, or the like； R2A and R2B are each independently hydrogen, halogen, alkyl, or the like； R3A and R3B are each independently hydrogen, halogen, alkyl, or the like； R4A and R4B are each independently hydrogen, halogen, alkyl, or the like； R3A and R3B may be taken together to form non-aromatic carbocycle or non-aromatic heterocycle； X is CH2, S or O； R1 is each independently halogen, hydroxy, or the like； m is any integer of 0 to 2； and n is any integer of 1 to 2.本發明提供一種具有抗病毒作用之以下之化合物：A1為CR1AR1B、S或O；A2為CR2AR2B、S或O；A3為CR3AR3B、S或O；A4為CR4AR4B、S或O；此處，由A1、A2、A3、A4、與A1鄰接之氮原子、及與A4鄰接之碳原子所構成之成環原子之雜原子之數為1個或2個；R1A及R1B分別獨立為氫、鹵素、或烷基等；R2A及R2B分別獨立為氫、鹵素、或烷基等；R3A及R3B分別獨立為氫、鹵素、或烷基等；R4A及R4B分別獨立為氫、鹵素、或烷基等；R3A及R3B可一起形成非芳香族碳環或非芳香族雜環；X為CH2、S或O；R1分別獨立為鹵素或羥基等；m為0~2之整數；n為1~2之整數)。
