ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29NCCC1%3DC%28NC2%3DC1C%3DC%28C%3DC2%29OC%29I/file?format=sdf&get3d=True -- CC%28%3DO%29NCCC1%3DC%28NC2%3DC1C%3DC%28C%3DC2%29OC%29I could not be loaded.