4-(3-(Hydroxy(oxido)amino)phenyl)-6-imino-1-isonicotinoyl-3-methyl-1,4,6,7-tetrahydropyrazolo[3,4-d][1,3]thiazine AIDS-141759 AIDS141759 NSC657985 {4H-Pyrazolo[3,4-d][1,3]thiazin-6-amine,} 3-methyl- {4-(3-nitrophenyl)-1-[(4-pyridinyl)carbonyl]-}