ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN1CCN%28CC%28C1%29NC%28%3DO%29c2cc%28c%28cc2OC%29NC%29Br%29C/file?format=sdf&get3d=True  -- CCN1CCN%28CC%28C1%29NC%28%3DO%29c2cc%28c%28cc2OC%29NC%29Br%29C could not be loaded.