InChI=1/C34H30O12/c35-20-6-4-18(5-7-20)31-27(19-12-22(37)14-23(38)13-19)25-11-16(3-8-26(25)45-31)1-2-17-9-21(36)15-24(10-17)44-34-30(41)28(39)29(40)32(46-34)33(42)43/h1-15,27-32,34-41H,(H,42,43)/b2-1+