ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC1%3DCC%3DCC%28%3DC1N%28COCC%29C%28%3DO%29CCl%29C/file?format=sdf&get3d=True  -- CCC1%3DCC%3DCC%28%3DC1N%28COCC%29C%28%3DO%29CCl%29C could not be loaded.