ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%5BC%40%40H%5D1CC%5BC%40%40H%5D%28C%29C%5BC%40H%5D1OC%28%3DO%29C/file?format=sdf&get3d=True  -- CC%28C%29%5BC%40%40H%5D1CC%5BC%40%40H%5D%28C%29C%5BC%40H%5D1OC%28%3DO%29C could not be loaded.