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