InChI=1S/C40H34O17/c41-15-38-14-23(21-7-5-20(44)13-27(21)55-38)39-30(35(38)50)29-25(46)9-16(10-28(29)56-40(39,57-39)22-8-6-18(42)11-24(22)45)1-2-17-3-4-19(43)12-26(17)53-37-33(49)31(47)32(48)34(54-37)36(51)52/h1-13,23,30-34,37,41-49H,14-15H2,(H,51,52)/b2-1+