InChI=1S/C36H36O17/c1-15-26(42)29(45)31(47)35(49-15)48-14-23-27(43)30(46)34(52-24(41)11-4-16-2-7-18(37)8-3-16)36(51-23)53-33-28(44)25-21(40)12-20(39)13-22(25)50-32(33)17-5-9-19(38)10-6-17/h2-13,15,23,26-27,29-31,34-40,42-43,45-47H,14H2,1H3/b11-4+