2(or 4)-Isobutyl-4(or 2),6-dimethyldihydro-4H-1,3,5-dithiazine Dihydro-2(or 6)-isobutyl-4,6(or 2)-dimethyl-4H-1,3,5-dithiazine Dihydro-4,6(or 2)-dimethyl-2(or 6)-(2-methylpropyl)-4H-1,3,5-dithiazine Dimethylisobutyldihydro-1,3,5-dithiazine