3-(8-(6,7-Diphenyl-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl)octyl)-6,7-diphenyl-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine AIDS-153511 AIDS153511 NSC700439