InChI=1S/C20H22O11/c21-14-7-11(30-20-17(24)15(22)16(23)18(31-20)19(25)26)6-10(29-14)3-1-9-2-4-12-13(5-9)28-8-27-12/h1-5,10-11,15-18,20,22-24H,6-8H2,(H,25,26)/b3-1+