InChI=1S/C36H34O19/c37-13-24-27(42)28(43)31(46)35(54-24)51-17-10-19(39)26-20(40)12-21(52-23(26)11-17)15-3-5-16(6-4-15)50-25(41)8-2-14-1-7-18(38)22(9-14)53-36-32(47)29(44)30(45)33(55-36)34(48)49/h1-12,24,27-33,35-39,42-47H,13H2,(H,48,49)/b8-2+