2-[2-(4-chloro-phenyl)-2-oxo-ethyl]-4,6-dimethyl-1,1-dioxo-1,2-dihydro-1λ6-isothiazolo[5,4-b]pyridin-3-one
2-[2-(4-bromo-phenyl)-2-oxo-ethyl]-4,6-dimethyl-1,1-dioxo-1,2-dihydro-1λ6-isothiazolo[5,4-b]pyridin-3-one
2-[2-(4-methoxy-phenyl)-2-oxo-ethyl]-4,6-dimethyl-1,1-dioxo-1,2-dihydro-1λ6-isothiazolo[5,4-b]pyridin-3-one