InChI=1S/C21H21N3O8/c1-24(21(30)13-4-2-12(3-5-13)20(22)23)9-15(25)14-6-7-16(31-10-18(26)27)17(8-14)32-11-19(28)29/h2-8H,9-11H2,1H3,(H3,22,23)(H,26,27)(H,28,29)