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