InChI=1S/C40H34O17/c1-38-14-21(19-7-9-25(29(46)33(19)56-38)53-37-32(49)30(47)31(48)34(54-37)36(51)52)39-28(35(38)50)27-24(45)10-15(2-3-16-4-5-17(41)12-22(16)43)11-26(27)55-40(39,57-39)20-8-6-18(42)13-23(20)44/h2-13,21,28,30-32,34,37,41-49H,14H2,1H3,(H,51,52)/b3-2+