InChI=1S/C28H24O12/c1-38-23-12-17(3-7-19(23)30)14-24(27(34)35)39-22-8-4-15(10-21(22)32)5-9-26(33)40-25(28(36)37)13-16-2-6-18(29)20(31)11-16/h2-12,14,25,29-32H,13H2,1H3,(H,34,35)(H,36,37)/b9-5+,24-14-