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