ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29C%28CCCN%28C%29CCC1%3DCC%28%3DC%28C%3DC1%29OC%29OC%29%28C/file?format=sdf&get3d=True  -- CC%28C%29C%28CCCN%28C%29CCC1%3DCC%28%3DC%28C%3DC1%29OC%29OC%29%28C could not be loaded.