InChI=1/C34H30O12/c35-20-7-2-16(3-8-20)1-4-18-11-23(38)15-25-26(18)27(19-12-21(36)14-22(37)13-19)31(45-25)17-5-9-24(10-6-17)44-34-30(41)28(39)29(40)32(46-34)33(42)43/h1-15,27-32,34-41H,(H,42,43)/b4-1+