154807-57-5 3-Methyl-5-n-butylureidoisothiazole-4-carboxylic acid p-methylthioanilide 4-Isothiazolecarboxamide, 5-(((butylamino)carbonyl)amino)-3-methyl-N-(4-(methylthio)phenyl)- 5-(((Butylamino)carbonyl)amino)-3-methyl-N-(4-(methylthio)phenyl)-4-isothiazolecarboxamide