InChI=1S/C34H30O11/c35-21-10-5-17(6-11-21)4-7-20-14-23(37)16-25-26(20)27(31(44-25)18-8-12-22(36)13-9-18)19-2-1-3-24(15-19)43-34-30(40)28(38)29(39)32(45-34)33(41)42/h1-16,27-32,34-40H,(H,41,42)/b7-4+