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