ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%28CCCCC1%29C%28%3DO%29NC2%3DC%28C%28%3DC%28C%3DC2%29O%29Cl%29Cl/file?format=sdf&get3d=True  -- CC1%28CCCCC1%29C%28%3DO%29NC2%3DC%28C%28%3DC%28C%3DC2%29O%29Cl%29Cl could not be loaded.