ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28%3DO%29NC1%3DCC%28%3DC%28C%3DC1%29Cl%29Cl/file?format=sdf&get3d=True  -- CCC%28%3DO%29NC1%3DCC%28%3DC%28C%3DC1%29Cl%29Cl could not be loaded.