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