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