2-((4-(4-(Hydroxy(oxido)amino)phenyl)-6-imino-3-methyl-6,7-dihydropyrazolo[3,4-d][1,3]thiazin-1(4H)-yl)carbonyl)phenol AIDS-141764 AIDS141764 NSC657992 {4H-Pyrazolo[3,4-d][1,3]thiazin-6-amine,} 1-(2- hydroxybenzoyl)-3-methyl-4-(4-nitrophenyl)-