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