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