ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1C%28%3DO%29N%28OC1%3DO%29C2%3DCC%28%3DC%28C%3DC2%29Cl%29Cl/file?format=sdf&get3d=True  -- CN1C%28%3DO%29N%28OC1%3DO%29C2%3DCC%28%3DC%28C%3DC2%29Cl%29Cl could not be loaded.