(1,2,4)Triazolo(1,5-a)pyrimidine-2-carboxylic acid, 7-hydroxy-5-methyl-, methyl ester 63665-74-7 EINECS 264-392-7 Methyl 7-hydroxy-5-methyl-1,2,4-triazolo(1,5-a)pyrimidine-2-carboxylate