ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc%28Cl%29cc1NC%28%3D%5BNH3%5D%29NC%28%3DN%29N/file?format=sdf&get3d=True  -- c1ccc%28Cl%29cc1NC%28%3D%5BNH3%5D%29NC%28%3DN%29N could not be loaded.