ERROR opening https://cactus.nci.nih.gov/chemical/structure/c12C%28c3c%28cccc3%29Cl%29%3DNCC%28N%28c1sc%28c2%29CC%29C%29%3DO/file?format=sdf&get3d=True  -- c12C%28c3c%28cccc3%29Cl%29%3DNCC%28N%28c1sc%28c2%29CC%29C%29%3DO could not be loaded.