ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC1%3DC%28C%3DC2C%28%3DC1%29C%28%3DO%29C3%3DC%28C2%28C%29C%29NC4%3DC3C%3DCC%28%3DC4%29C/file?format=sdf&get3d=True  -- CCC1%3DC%28C%3DC2C%28%3DC1%29C%28%3DO%29C3%3DC%28C2%28C%29C%29NC4%3DC3C%3DCC%28%3DC4%29C could not be loaded.