InChI=1S/C31H28O16/c1-43-19-6-10(2-3-14(19)33)26-21(30(42)47-31-25(39)23(37)24(38)28(46-31)29(40)41)13-4-11(5-17(36)27(13)45-26)18-9-16(35)22-15(34)7-12(32)8-20(22)44-18/h2-8,18,21,23-26,28,31-34,36-39H,9H2,1H3,(H,40,41)