antiviral activity 6 article 6 nonhuman 6 Herpes simplex virus 4 Herpes simplex virus 1 4 Herpes simplex virus 2 4 Human cytomegalovirus 4 aciclovir 4 animal cell 4 antivirus agent 4 controlled study 4 cytotoxicity 4 drug mechanism 4 drug structure 4 drug synthesis 4 human 4 human cell 4 unclassified drug 4 1 hydroxy 10 methyl 9(10h) acridone 2 1,3 dihydroxy 5 methoxyacridone 2 10 allyl 6 chloro 4 methoxy 9(10h) acridone 2 10 allyl 6 chloro 9(10h) acridone 2 2 fluoro 5 methoxy n (pyridine 3 yl)acridone 4 carboxamide 2 3 allyloxy 7 methoxy 1 hydroxyacridone 2 3,7 dimethoxy 1 hydroxyacridone 2 5 chloro 1,3 dihydroxyacridone 2 7 amino 1,3 dihydroxy 10 methyl 6 [4 (2 pyridinyl) 1 piperazinyl] 9(10h) acridone 2 7 amino 1,3 dimethoxy 10 methyl 6 [4 (4 thiazol) 1 piperazinyl] 9(10h) acridone 2 7 chloro 1,3 dihydroxyacridone 2 7 nitro 6 chloro 1,3 dimethoxy 10 methyl 9(10h) acridone 2