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