ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29CCC1%28C%3DCC2%3DCC%3DCC%3DC21%29C3%3DCC%3DCC%3DC3/file?format=sdf&get3d=True  -- CN%28C%29CCC1%28C%3DCC2%3DCC%3DCC%3DC21%29C3%3DCC%3DCC%3DC3 could not be loaded.