ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1CN%3DC%28C%28C%3DC%28Cl%29C%3DC2%29%3DC2N1%29C3%3DCCCCC3/file?format=sdf&get3d=True  -- O%3DC1CN%3DC%28C%28C%3DC%28Cl%29C%3DC2%29%3DC2N1%29C3%3DCCCCC3 could not be loaded.