InChI=1S/C35H28O14/c36-18-8-5-15(6-9-18)4-7-16-10-19(37)13-23-25(16)35(34(45)48-23)26-22(39)12-20(38)14-24(26)47-31(35)17-2-1-3-21(11-17)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+