ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28C%29%28CC%29C1%3DNOC%28%3DC1%29NC%28%3DO%29C2%3DC%28C%3DCC%3DC2OC%29OC/file?format=sdf&get3d=True -- CCC%28C%29%28CC%29C1%3DNOC%28%3DC1%29NC%28%3DO%29C2%3DC%28C%3DCC%3DC2OC%29OC could not be loaded.