ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DCC%3DC%28C%28%3DC1%29C%28Br%29Br%29C%28Br%29Br/file?format=sdf&get3d=True  -- C1%3DCC%3DC%28C%28%3DC1%29C%28Br%29Br%29C%28Br%29Br could not be loaded.