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