ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%5BN%2B%5D%28CC%29%28CC%29CC.Cl%5BCl-%5DCl/file?format=sdf&get3d=True  -- CC%5BN%2B%5D%28CC%29%28CC%29CC.Cl%5BCl-%5DCl could not be loaded.