InChI=1S/C21H22O9/c1-10(11-5-3-2-4-6-11)15(23)13-8-7-12(9-14(13)22)29-21-18(26)16(24)17(25)19(30-21)20(27)28/h2-10,16-19,21-22,24-26H,1H3,(H,27,28)