ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29CCC%5BC%40%40H%5D%28C%29CCC%5BC%40%40H%5D%28C%29CCC/C%28%3DC/CO%29/C/file?format=sdf&get3d=True  -- CC%28C%29CCC%5BC%40%40H%5D%28C%29CCC%5BC%40%40H%5D%28C%29CCC/C%28%3DC/CO%29/C could not be loaded.