InChI=1S/C20H26O12/c1-7-2-3-10(12-8(7)4-28-18(12)27)31-20-17(26)15(24)14(23)11(32-20)6-30-19-16(25)13(22)9(21)5-29-19/h2-3,9,11,13-17,19-26H,4-6H2,1H3