4H-1,3-dioxin-5-carboxamide, 6-hydroxy-2,2-dimethyl-4-oxo-N-phenyl- 6-hydroxy-2,2-dimethyl-4-oxo-N-phenyl-4H-1,3-dioxine-5-carboxamide InChI=1/C13H13NO5/c1-13(2)18-11(16)9(12(17)19-13)10(15)14-8-6-4-3-5-7-8/h3-7,16H,1-2H3,(H,14,15