InChI=1S/C20H19NO10/c1-29-11-6-7(5-8-12-9(21-13(8)11)3-2-4-10(12)22)19(28)31-20-16(25)14(23)15(24)17(30-20)18(26)27/h2-6,14-17,20-25H,1H3,(H,26,27)