InChI=1/C21H18N4O4/c1-2-21(28)14-7-17-18-11(8-25(17)19(26)13(14)9-29-20(21)27)6-12-15(23-10-22)4-3-5-16(12)24-18/h3-7,10,28H,2,8-9H2,1H3,(H2,22,23)/t21-/m0/s1/f/h22H2 E7F14D35FEAC04A8