ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%28C%29C%28%3DO%29C%28N1C%3DNC%3DN1%29OC2%3DCC%3DC%28C%3DC2%29Cl/file?format=sdf&get3d=True  -- CC%28C%29%28C%29C%28%3DO%29C%28N1C%3DNC%3DN1%29OC2%3DCC%3DC%28C%3DC2%29Cl could not be loaded.