ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OCCN%28CC%29CC%29C2%28c1ccccc1%29CCCC2/file?format=sdf&get3d=True  -- O%3DC%28OCCN%28CC%29CC%29C2%28c1ccccc1%29CCCC2 could not be loaded.