InChI=1/C13H11N3O4/c17-12-6-4-9(5-7-12)14-13(18)15-10-2-1-3-11(8-10)16(19)20/h1-8,17H,(H2,14,15,18 N-(4-hydroxyphenyl)-N'-(3-nitrophenyl)urea urea, N-(4-hydroxyphenyl)-N'-(3-nitrophenyl)-