ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BNa%2B%5D.FC%28F%29%28F%29S%28%5BO-%5D%29%3DO/file?format=sdf&get3d=True  -- %5BNa%2B%5D.FC%28F%29%28F%29S%28%5BO-%5D%29%3DO could not be loaded.