ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DC%28C%3DC%28C%28%3DC1Br%29O%29C2%3DC%28C%28%3DC%28N2%29Br%29Br%29Br%29Br/file?format=sdf&get3d=True  -- C1%3DC%28C%3DC%28C%28%3DC1Br%29O%29C2%3DC%28C%28%3DC%28N2%29Br%29Br%29Br%29Br could not be loaded.