InChI=1S/C37H28O15/c1-48-17-10-26-30(27(11-17)51-37-33(45)31(43)32(44)35(52-37)36(46)47)23(42)14-25(49-26)16-7-8-19(38)18(9-16)28-20(39)12-21(40)29-22(41)13-24(50-34(28)29)15-5-3-2-4-6-15/h2-14,31-33,35,37-40,43-45H,1H3,(H,46,47)