InChI=1S/C35H28O13/c36-19-10-7-16(8-11-19)6-9-18-12-20(37)13-22-25(18)35(34(44)47-22)26-23(45-31(35)17-4-2-1-3-5-17)14-21(38)15-24(26)46-33-29(41)27(39)28(40)30(48-33)32(42)43/h1-15,27-31,33,36-41H,(H,42,43)/b9-6+