InChI=1S/C22H21NO9/c1-23-12-5-3-2-4-11(12)15(25)9-13(23)10-6-7-14(24)16(8-10)31-22-19(28)17(26)18(27)20(32-22)21(29)30/h2-9,17-20,22,24,26-28H,1H3,(H,29,30)