InChI=1/C20H16N2O6/c23-17-7-5-15(9-21-17)19(25)27-11-13-1-2-14(4-3-13)12-28-20(26)16-6-8-18(24)22-10-16/h1-10H,11-12H2,(H,21,23)(H,22,24)/f/h21-22H 4A14B0066EE63BC4