1-(4-Methyl-5-isothiazolyl)methylenethiosemicarbazide 3683-59-8 4-Methylisothiazole-5-carboxaldehyde thiosemicarbazone BRN 0517976 ISOTHIAZOLE-5-CARBOXALDEHYDE, 4-METHYL-, THIOSEMICARBAZONE Thiosemicarbazide, 1-(4-methyl-5-isothiazolyl)methylene-