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