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