5H-thiazolo[3,2-a]pyrimidine-6-carboxylic acid, 2,3-dihydro-5-oxo-, ethyl ester InChI=1/C9H10N2O3S/c1-2-14-8(13)6-5-10-9-11(7(6)12)3-4-15-9/h5H,2-4H2,1H ethyl 5-oxo-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate