ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CC%28%3DO%29N%3DC1NC%28%3DO%29NC2%3DCC%28%3DCC%3DC2%29Cl/file?format=sdf&get3d=True  -- CN1CC%28%3DO%29N%3DC1NC%28%3DO%29NC2%3DCC%28%3DCC%3DC2%29Cl could not be loaded.