1,3,7-trimethyl-2H-pyrimido[1,2-a]pyrimidine-2,8(1H)-dione 2H-pyrimido[1,2-a]pyrimidine-2,8(1H)-dione, 1,3,7-trimethyl- InChI=1/C10H11N3O2/c1-6-4-13-5-7(2)9(15)12(3)10(13)11-8(6)14/h4-5H,1-3H