InChI=1S/C35H28O14/c36-18-3-1-2-17(11-18)31-35(26-22(39)12-20(38)14-24(26)47-31)25-16(10-19(37)13-23(25)48-34(35)45)7-4-15-5-8-21(9-6-15)46-33-29(42)27(40)28(41)30(49-33)32(43)44/h1-14,27-31,33,36-42H,(H,43,44)/b7-4+