2-Butenoic acid, 4-((5-(1-methylethyl)-1,3,4-thiadiazol-2-yl)amino)-4-oxo-, methyl ester 4-((5-(1-Methylethyl)-1,3,4-thiadiazol-2-yl)amino)-4-oxo-2-butenoic acid methyl ester EM9253000