InChI=1/C20H18N2O6/c1-26-14-6-8-16(9-7-14)28-11-10-27-15-4-2-13(3-5-15)12-17-18(23)21-20(25)22-19(17)24/h2-9,12H,10-11H2,1H3,(H2,21,22,23,24,25)/f/h21-22H 3DB6A804C8164014