2,4,6(1H,3H,5H)-pyrimidinetrione, 5-[(5-chloro-2-hydroxyphenyl)methylene]- 5-(5-chloro-2-hydroxybenzylidene)pyrimidine-2,4,6(1H,3H,5H)-trione InChI=1/C11H7ClN2O4/c12-6-1-2-8(15)5(3-6)4-7-9(16)13-11(18)14-10(7)17/h1-4,15H,(H2,13,14,16,17,18