InChI=1S/C37H28O17/c1-50-21-7-4-14(23-10-19(41)28-25(51-23)12-20(42)29(43)30(28)44)8-16(21)26-24(53-37-33(47)31(45)32(46)35(54-37)36(48)49)11-18(40)27-17(39)9-22(52-34(26)27)13-2-5-15(38)6-3-13/h2-12,31-33,35,37-38,40,42-47H,1H3,(H,48,49)