InChI=1S/C35H28O13/c36-19-13-18(12-11-16-7-3-1-4-8-16)23-21(14-19)46-34(44)35(23)24-22(45-31(35)17-9-5-2-6-10-17)15-20(37)25(38)29(24)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+