InChI=1S/C35H24O15/c36-16-8-6-14(7-9-16)21(31(41)42)26(38)27(39)22(32(43)44)15-10-17-18(12-20(37)29-24(17)19(11-15)34(47)49-29)25-28(40)30(50-35(25)48)23(33(45)46)13-4-2-1-3-5-13/h1-12,22-23,27,30,36-40H,(H,41,42)(H,43,44)(H,45,46)/b26-21-