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