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