InChI=1S/C35H28O15/c36-17-6-2-14(3-7-17)1-4-15-9-18(37)11-23-25(15)35(34(46)49-23)26-22(40)12-19(47-33-29(43)27(41)28(42)30(50-33)32(44)45)13-24(26)48-31(35)16-5-8-20(38)21(39)10-16/h1-13,27-31,33,36-43H,(H,44,45)/b4-1+