InChI=1/C14H12N2O4/c17-11-7-3-1-5-9(11)15-13(19)14(20)16-10-6-2-4-8-12(10)18/h1-8,17-18H,(H,15,19)(H,16,20 N,N'-bis(2-hydroxyphenyl)ethanediamide ethanediamide, N,N'-bis(2-hydroxyphenyl)-