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