InChI=1S/C35H28O13/c36-18-13-20(37)25-22(14-18)45-31(17-9-5-2-6-10-17)35(25)24-19(12-11-16-7-3-1-4-8-16)29(21(38)15-23(24)46-34(35)44)47-33-28(41)26(39)27(40)30(48-33)32(42)43/h1-15,26-28,30-31,33,36-41H,(H,42,43)/b12-11+