InChI=1S/C34H30O10/c35-22-13-10-18(11-14-22)9-12-21-16-24(42-34-30(39)28(37)29(38)32(44-34)33(40)41)17-25-26(21)27(20-7-4-8-23(36)15-20)31(43-25)19-5-2-1-3-6-19/h1-17,27-32,34-39H,(H,40,41)/b12-9+