ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1%5BC%40%40H%5D2CC%5BC%40H%5D1CC%28%3DO%29C2/file?format=sdf&get3d=True  -- CN1%5BC%40%40H%5D2CC%5BC%40H%5D1CC%28%3DO%29C2 could not be loaded.