InChI=1S/C35H26O17/c36-15-5-1-12(2-6-15)21(31(43)44)26(39)28(41)23(33(47)48)14-9-17-18(11-20(38)30-24(17)19(10-14)35(51)52-30)25(34(49)50)29(42)27(40)22(32(45)46)13-3-7-16(37)8-4-13/h1-11,23,25,28-29,36-42H,(H,43,44)(H,45,46)(H,47,48)(H,49,50)/b26-21-,27-22-