InChI=1/C24H14Br2O4/c25-18-11-14(7-9-20(18)27)24(15-8-10-21(28)19(26)12-15)17-6-2-4-13-3-1-5-16(22(13)17)23(29)30-24/h1-12,27-28H 6A51EAF9F317BA34