InChI=1S/C20H26O12/c21-7-12-14(25)15(26)16(32-19-17(27)20(28,8-22)9-29-19)18(31-12)30-11-4-1-10(2-5-11)3-6-13(23)24/h1-6,12,14-19,21-22,25-28H,7-9H2,(H,23,24)/b6-3+