(1,2,4)Triazolo(1,5-a)pyrimidine-6-carboxylic acid, 7-hydroxy-5-methyl-2-(methylthio)-, ethyl ester 63123-21-7 EINECS 263-870-2 Ethyl 7-hydroxy-5-methyl-2(methylthio)-1,2,4-triazolo(1,5-a)pyrimidine-6-carboxylate