InChI=1S/C20H22O12/c1-20(6-21,32-19-15(26)13(24)14(25)16(31-19)18(27)28)17-12(23)8-4-7-2-3-11(22)29-9(7)5-10(8)30-17/h2-5,12-17,19,21,23-26H,6H2,1H3,(H,27,28)