InChI=1S/C35H28O13/c36-19-10-8-17(9-11-19)31-35(26-22(38)13-20(37)14-23(26)46-31)25-18(7-6-16-4-2-1-3-5-16)12-21(15-24(25)47-34(35)44)45-33-29(41)27(39)28(40)30(48-33)32(42)43/h1-15,27-31,33,36-41H,(H,42,43)/b7-6+