4H-Pyrazolo[3,4-d][1,3]thiazin-6-amine, N-(4-carboxy phenyl)-4-oxo-2-(phenylmethyl)- Benzoic acid, 4-[[2-(phenylmethyl)-4-oxo-4H-pyrazolo[3,4][1,3]thiazin-6-yl]amino]- NSC654967