ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29C%28CCC%28C%29C%29C1%28CCC1%29c1cc%28Cl%29c%28Cl%29cc1/file?format=sdf&get3d=True  -- CN%28C%29C%28CCC%28C%29C%29C1%28CCC1%29c1cc%28Cl%29c%28Cl%29cc1 could not be loaded.