ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC12CCN%28OC1N%28C3%3DC2C%3DC%28C%3DC3%29OC%28%3DO%29NC%29C%29C/file?format=sdf&get3d=True  -- CC12CCN%28OC1N%28C3%3DC2C%3DC%28C%3DC3%29OC%28%3DO%29NC%29C%29C could not be loaded.