InChI=1S/C20H22O9/c21-12-3-1-2-10(6-12)4-5-11-7-13(22)9-14(8-11)28-20-17(25)15(23)16(24)18(29-20)19(26)27/h1-3,6-9,15-18,20-25H,4-5H2,(H,26,27)