ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC%28C%28%3DO%29N%28C%28%3DO%29N1%29C%28C%29%28C%29C%29Cl/file?format=sdf&get3d=True  -- CC1%3DC%28C%28%3DO%29N%28C%28%3DO%29N1%29C%28C%29%28C%29C%29Cl could not be loaded.