InChI=1/C12H13N3O3/c1-4-18-12(17)10-6-14-15-7(2)9(8(3)16)5-13-11(10)15/h5-6H,4H2,1-3H ethyl 6-acetyl-7-methylpyrazolo[1,5-a]pyrimidine-3-carboxylate pyrazolo[1,5-a]pyrimidine-3-carboxylic acid, 6-acetyl-7-methyl-, ethyl ester