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