ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCCCCCCCC%28%3DO%29NC%28CCCN%3DC%28N%29N%29C%28%3DO%29OCC.Cl/file?format=sdf&get3d=True  -- CCCCCCCCCCCC%28%3DO%29NC%28CCCN%3DC%28N%29N%29C%28%3DO%29OCC.Cl could not be loaded.