3,3'-dithiobis(propionic acid)
6-methyl-4-oxo-3,4-dihydro-2H,6H-thiopyrano<3,2-c><2,1>benzothiazine 5,5-dioxide
6-methyl-1-oxo-2,3-dihydro-1H,6H,12H-thiopyrano<3,2-c>thiopyrano<3,2-c><2,1>benzothiazine 5,5-dioxide
1-methyl-2,2-dioxo-2,3-dihydro-1H-2λ6-benzo[c][1,2]thiazin-4-one