ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CC%28CCC1NCC2%3DCC%28%3DCC%28%3DC2N%29Br%29Br%29O/file?format=sdf&get3d=True  -- C1CC%28CCC1NCC2%3DCC%28%3DCC%28%3DC2N%29Br%29Br%29O could not be loaded.