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