InChI=1/C20H18N2O6/c1-11(20(26)22-14-4-2-12(3-5-14)19(21)25)28-18(24)8-13-10-27-17-9-15(23)6-7-16(13)17/h2-7,9-11,23H,8H2,1H3,(H2,21,25)(H,22,26)/t11-/m1/s1/f/h22H,21H2 5B00F02093BCA0D1