InChI=1S/C35H28O15/c36-17-6-4-15(5-7-17)31-35(26-21(40)11-19(38)13-24(26)47-31)25-16(10-18(37)12-23(25)49-34(35)46)3-1-14-2-8-22(20(39)9-14)48-33-29(43)27(41)28(42)30(50-33)32(44)45/h1-13,27-31,33,36-43H,(H,44,45)/b3-1+