2,2-dimethyl-4H-1,4-benzothiazin-3-one

1,4-dimethylphenothiazin-3-one

2-propyl-4H-1,4-benzothiazin-3-one

2,4-dimethylphenothiazin-3-one

3-chloro-2H-1,4-benzothiazine