3H-[1,2,5]Oxadiazolo[3,4-c][1,2,6]thiadiazin-7(6H)-imine 5,5-dioxide 57116-33-3 AIDS-128582 AIDS128582 NSC289497 {3H-[1,2,5]Oxadiazolo[3,4-c][1,2,6]thiadiazin-7-amine,} 5,5-dioxide