InChI=1S/C39H32O15/c40-19-29-36(52-30(46)15-5-20-1-9-23(41)10-2-20)34(49)38(53-31(47)16-6-21-3-11-24(42)12-4-21)39(51-29)54-37-33(48)32-27(45)17-26(44)18-28(32)50-35(37)22-7-13-25(43)14-8-22/h1-18,29,34,36,38-45,49H,19H2/b15-5+,16-6+