InChI=1/C13H10FN3O4/c14-11-6-3-9(7-12(11)17(20)21)16-13(19)15-8-1-4-10(18)5-2-8/h1-7,18H,(H2,15,16,19 N-(4-fluoro-3-nitrophenyl)-N'-(4-hydroxyphenyl)urea urea, N-(4-fluoro-3-nitrophenyl)-N'-(4-hydroxyphenyl)-