1-Isopropyl-5-chloro-1H-1,2,4-triazole-3(2H)-one

5-chloro-1,2-dihydro-1-isopropyl-3H-1,2,4-triazol-3-one

5-Chloro-1,2-dihydro-1-(1-methylethyl)-3H-1,2,4-triazol-3-one