Comparison of the activities of analogs of dithiazinine (111) against gsstrointest, inal nemzto- lea of sheep showed that the pentamethine chain is essential. Activity may be retzined when the 6 position is sitbstitritel with alkyl or alkoxy groups, but substitution with electron- withdrawing groups produces inactjive conpoitii. ls. ilnalogs with activity comparable to dithiazinine tended to be more toxic to mice than dithiazina itsdf. Two members of a series ...
![(2Z)-3-ethyl-2-[(2E,4E)-5-(3-ethyl-7-methyl-1,3-benzothiazol-3-ium-2-yl)penta-2,4-dienylidene]-7-methyl-1,3-benzothiazole,iodide Structure](https://image.chemsrc.com/caspic/485/10258-80-7.png)