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