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