(4-oxo-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl)acetic acid 5-pyrimidineacetic acid, 1,2,3,4-tetrahydro-4-oxo-2-thioxo- InChI=1/C6H6N2O3S/c9-4(10)1-3-2-7-6(12)8-5(3)11/h2H,1H2,(H,9,10)(H2,7,8,11,12