InChI=1/C21H18N4O5/c1-21(15-8-6-13(11-22)7-9-15)19(28)25(20(29)24-21)12-17(26)23-16-5-3-4-14(10-16)18(27)30-2/h3-10H,12H2,1-2H3,(H,23,26)(H,24,29)/t21-/m0/s1/f/h23-24H 744043252D17B20B