3-(6-oxo-1,6-dihydropyrimidin-5-yl)alanine 5-pyrimidinepropanoic acid, alpha-amino-3,4-dihydro-4-oxo- InChI=1/C7H9N3O3/c8-5(7(12)13)1-4-2-9-3-10-6(4)11/h2-3,5H,1,8H2,(H,12,13)(H,9,10,11