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