ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%28CC1%3DCC%3DC%28C%3DC1%29Cl%29C2%3DCC%3DCC%28%3DC2%29C/file?format=sdf&get3d=True  -- CC%28C%28CC1%3DCC%3DC%28C%3DC1%29Cl%29C2%3DCC%3DCC%28%3DC2%29C could not be loaded.