ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BCl-%5D.c4ccc%28c3nn%28c1ccccc1%29%5Bn%2B%5D%28c2ccccc2%29n3%29cc4/file?format=sdf&get3d=True  -- %5BCl-%5D.c4ccc%28c3nn%28c1ccccc1%29%5Bn%2B%5D%28c2ccccc2%29n3%29cc4 could not be loaded.