ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCC2%3DC%28CC1%29NC3%3DC2C%3DCC%28%3DC3%29OC/file?format=sdf&get3d=True -- CN1CCC2%3DC%28CC1%29NC3%3DC2C%3DCC%28%3DC3%29OC could not be loaded.