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