InChI=1S/C36H30O15/c1-47-30-21(39)9-15(10-22(30)40)7-8-17-11-19(48-34-29(43)27(41)28(42)31(51-34)33(44)45)14-24-25(17)36(35(46)50-24)26-20(38)12-18(37)13-23(26)49-32(36)16-5-3-2-4-6-16/h2-14,27-29,31-32,34,37-43H,1H3,(H,44,45)/b8-7+