InChI=1/C16H12N2O4/c17-15(19)9-21-11-5-4-10-7-12(13-3-1-2-6-18-13)16(20)22-14(10)8-11/h1-8H,9H2,(H2,17,19)/f/h17H2 152D9F2BB7D0CBE7