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