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