InChI=1S/C35H28O15/c36-16-6-4-15(5-7-16)31-35(25-20(38)11-17(37)12-22(25)48-31)24-19(26(40)21(39)13-23(24)49-34(35)46)10-3-14-1-8-18(9-2-14)47-33-29(43)27(41)28(42)30(50-33)32(44)45/h1-13,27-31,33,36-43H,(H,44,45)/b10-3+