InChI=1S/C27H24O13/c28-16-5-1-14(10-18(16)30)11-22(26(35)36)39-23(33)8-3-13-2-7-21(20(32)9-13)40-25(27(37)38)24(34)15-4-6-17(29)19(31)12-15/h1-10,12,22,24-25,28-32,34H,11H2,(H,35,36)(H,37,38)/b8-3+