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