2H-1,4-Benzothiazin-3-one, 3,4-dihydro-2-[2-[(2,5-dimethylphenyl)amino]-2-oxoethyl]- Acetamide, 2-(3,4-dihydro-3-oxo-2H-1,4-benzothiazin-2-yl)- N-(2,5-dimethylphenyl)- NSC637603