ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%28O%29C%28Br%29%3DC%28Br%29C%28%3DO%29O1/file?format=sdf&get3d=True  -- C1%28O%29C%28Br%29%3DC%28Br%29C%28%3DO%29O1 could not be loaded.