ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28N%28C%29Cc1c%28nc2ccccn12%29c3ccc%28Cl%29cc3%29CCC/file?format=sdf&get3d=True  -- O%3DC%28N%28C%29Cc1c%28nc2ccccn12%29c3ccc%28Cl%29cc3%29CCC could not be loaded.