InChI=1S/C35H28O15/c36-17-6-3-15(4-7-17)31-35(26-22(40)10-19(38)12-24(26)48-31)25-16(9-18(37)11-23(25)49-34(35)46)2-1-14-5-8-20(13-21(14)39)47-33-29(43)27(41)28(42)30(50-33)32(44)45/h1-13,27-31,33,36-43H,(H,44,45)/b2-1+