InChI=1S/C33H30O18/c34-17-5-1-15(10-18(17)35)12-23(30(42)43)48-21-6-2-14(9-19(21)36)4-8-25(38)49-24(31(44)45)13-16-3-7-22(20(37)11-16)50-33-28(41)26(39)27(40)29(51-33)32(46)47/h1-12,24,26-29,33-37,39-41H,13H2,(H,42,43)(H,44,45)(H,46,47)/b8-4+,23-12-