ERROR opening https://cactus.nci.nih.gov/chemical/structure/Fc1c%28F%29c%28F%29c%28F%29c%28F%29c1F/file?format=sdf&get3d=True  -- Fc1c%28F%29c%28F%29c%28F%29c%28F%29c1F could not be loaded.