InChI=1S/C21H22O9/c22-15-16(23)18(19(25)26)30-21(17(15)24)29-14-9-5-4-6-12(14)10-11-28-20(27)13-7-2-1-3-8-13/h1-9,15-18,21-24H,10-11H2,(H,25,26)