129521-53-5 2,4-Dihydro-2-ethyl-4-methyl-5-(2-thienyl)-3H-1,2,4-triazol-3-one 3H-1,2,4-Triazol-3-one, 2,4-dihydro-2-ethyl-4-methyl-5-(2-thienyl)- BRN 4185638