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