InChI=1S/C34H32O18/c1-48-33(47)25(14-17-3-7-19(36)23(12-17)51-34-29(42)27(40)28(41)30(52-34)32(45)46)49-22-8-4-15(10-21(22)38)5-9-26(39)50-24(31(43)44)13-16-2-6-18(35)20(37)11-16/h2-12,14,24,27-30,34-38,40-42H,13H2,1H3,(H,43,44)(H,45,46)/b9-5+,25-14-