ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BCl-%5D.Nc1cc%28N%29c2nc3ccccc3%5Bn%2B%5D%28c4ccccc4%29c2c1/file?format=sdf&get3d=True  -- %5BCl-%5D.Nc1cc%28N%29c2nc3ccccc3%5Bn%2B%5D%28c4ccccc4%29c2c1 could not be loaded.