InChI=1/C17H14N2O4/c20-16-6-2-10-7-12(3-4-13(10)19-16)18-17(21)11-1-5-14-15(8-11)23-9-22-14/h1,3-5,7-8H,2,6,9H2,(H,18,21)(H,19,20)/f/h18-19H 6550204B356F849C